Friday 21 August 2020

The Great Earthquake of 1868

The morning of October 21, 1868, dawned clear with a temperature of fifty-nine degrees in downtown San Francisco. At 7:53 am, a 7.0 magnitude quake hit the San Francisco Bay Area. The quake on the Hayward Fault lasted for about 1 minute and was felt over most of Northern California. The earthquake was caused by a lateral shift along a 40 mile stretch of the fault, running from Fremont, north to Berkeley.

Fissures also opened along the fault, leaving long gaping holes in the ground. Although the epicenter of the earthquake was in the East Bay, most of the major damage to structures (by sheer numbers) was in San Francisco. This was because the East Bay was not as developed as San Francisco and had fewer brick buildings. The total reported death toll for the entire Bay area was five, with thirty persons injured. Until 1906, the 1868 earthquake was considered the "Great Earthquake."

 

The Fault

The Hayward Fault runs from Fremont, north through Berkeley, and ends somewhere in San Pablo Bay. The fault roughly follows the hills, but it does go through several cities. In Fremont, the fault is marked by the ponds next to the BART station. In Union City, the fault can be seen in the shift in Dry Creek at Garin/Dry Creek/Pioneer Regional Park.


Through the hills of southern Hayward, the fault can be seen by shifts in the ravines coming down the hillsides. In downtown Hayward, the fault runs right through the heart of downtown, under the 1930's City Hall, and through several buildings. Highway 13 was built in the valley created by the fault in the hills. In Berkeley, the fault runs under Memorial Stadium where creep in the fault can easily be seen by the offset in the stadium walls.


The Hayward fault runs parallel to several other local faults. To the west is the well-known San Andreas fault. To the east is the Calaveras fault and further east is the Clayton-Marsh Creek-Greenville fault. All these faults are created by the Pacific Plate traveling northward at a very slow rate. As the plate moves north, the different faults are created by the stress of the Pacific Plate rubbing against the North American Plate.


Movement in the faults is expressed in two ways, creep or ruptures. Creep is a very small movement along the faults and can be seen in small shifts in pavement or sidewalks. A rupture is a sudden and large movement along the fault, sometimes measured in feet. The stress of the Plates moving causes the faults to get locked up and build up stress. Creep relieves some fault stress, but not all of it. When the stress builds up enough to overcome any locking of the fault, then a rupture happens, which means an earthquake.

 

The Bay Area in 1868

The year 1868 was only twenty years after the start of the Gold Rush and California had been a state for only 18 years. The Gold Rush greatly increased the population in California, but there were still many places where it was rural and had a low population density. The Bay Area was slowly transitioning from the Pioneer to the Victorian era.


Like today, the major population centers were the three cities of San Francisco, Oakland, and San Jose. San Francisco had a population of 150,000 in 1870. San Francisco took up only the western quarter of the peninsula. Oakland and San Jose were much smaller at 12,000 and 9,000 respectively. In 1868, Oakland was only that area to the northwest of Lake Merritt. The towns of San Antonio, Fruitvale, Brooklyn, and Clinton were their own separate entities.


Outside of these three major cities, the population density was low. The 1870 census shows Hayward had a population of 504. The county seat of Alameda County, San Leandro, had a population of 426. San Lorenzo had a population of 158. In Washington Township, the towns were smaller; Alvarado was 364, Centerville 203 (1880), Niles 186 (1880), and Mission San Jose 246 (1880).


The East Bay was the breadbasket for the three larger towns, esp. San Francisco. Although cattle were the main industry in the East Bay before statehood. It was quickly transitioning to fruit orchards, potatoes, wheat, and hay. Jose de Jesus Vallejo, of Mission San Jose, was operating a flour mill near the mouth of Niles Canyon starting in 1852. 


Along the East Bay shoreline, landings cropped up to move the produce and hay from the East Bay to San Francisco and beyond. There was Mowry's, Jarvis, Plummer's, Barron's, Warm Springs, Robert's, Hayward, Eden, and San Leandro landings. Two-masted scow schooners were sailing all over the bay moving the goods that were needed by the people of San Francisco.


The year 1868 was still the time of the horse and buggy. The first railway line in the East Bay was built in 1867, but it did not connect to the East Coast until 1869. There were two roads connecting Oakland with Southern Alameda County. The first was what is now East 14th and Mission Blvd. The second is now Hesperian, Alvarado, and Fremont Blvd. This was known years later as Highway 17 up until the freeway was built.


The Earthquake

The main quake hit at 7:53AM, measuring a magnitude of 7.0. The shock traveled from the southwest to the northeast. A total of 36 aftershocks were recorded within 12 hours of the main earthquake. The major aftershocks were timed at 8:26 am, 8:44 am, 8:47 am, 9:11 am, 10:15 am, 3:12 pm, 3:17 pm, and 4:08 pm.


The main earthquake caused a crack to open in the ground from 6 inches to two feet. The crack was traced from Mills College in Oakland all the way to Warm Springs at the southern end of Alameda County. There was also an off shift in the land where the western part of the fault moved as much as six feet to the north. Displacement was seen in both creeks and fences crossing the fault.


The East Bay

The East Bay was the area closest to the earthquake, with the fault running close or through most of the towns of the East Bay. The strongest shaking was felt here, but the damage was low due to the low population and a low number of brick buildings.


Fremont Area

Fremont was incorporated in 1956. Before that, there were the five towns of Mission San Jose, Centerville, Niles, Irvington, and Warm Springs. The reports on the earthquake used the original town names.


Mission San Jose

Mission San Jose was built out of unbaked adobe bricks and wood. Adobe is not known for standing up well to the shaking of an earthquake. The 1868 earthquake destroyed the Mission Church. Witnessed by E.S. Ehrman, the roof of the church came crashing down, causing a large cloud of dust. Luckily the five mission bells were not damaged in the quake. 


Smaller nearby buildings to the Mission church were also damaged or destroyed by the earthquake. Mr. N. Ainsworth, a Mission San Jose resident, said this about the earthquake; "I was curled up in a big rocking chair, reading, and my two sisters were outside playing, when suddenly there came a swaying of the house.


This lasted only a short time, then the house began to shake in earnest. My sisters began to cry and scream. I jumped out of the chair to go to them, and ran from the room, bumping against both sides of two doors. I finally reached the porch and succeeded in catching hold of a post. I distinctly remember that the pump in the yard was pumping as if someone had hold of it; and small rocks on the hill in front of the house were rolling down the creek.


The milk pans had been resting on shelves of slats, some pans slipped entirely out, some only halfway. The milk and cream were on the floor. My brother was hauling a load of wheat to San Jose. When the earthquake was at its worst, he thought his team was choking down and jumped off his wagon to find he could hardly stand. I was told at the time that the water spurted up in the streets of San Jose and out in the road between Milpitas and San Jose, to the height of several feet.


The old Mission church, which was of adobe, was shaken down, as were several other buildings at the same place. On the mountain above the old Mission, much above a place called Peacock Springs, a great crack in the earth appeared, which looked as if the lower part of the mountain had parted and slipped down." The adobe home built by Jose de Jesus Vallejo, at the corner of Mission and Washington, across from the church, was severely damaged in the earthquake.


Warm Springs

Most of the damage in Warm Springs centered around Warm Springs Landings. It is in Warm Springs that the crack from the fault ended. Mr. H. Curtner who owned a large farm in the Warm Springs area reported the following; "The crack past along the foot-hills at an elevation of 350 to 450 feet from Niles southward, back of Mission San Jose, disappearing near the county line. In some places, the fissure showed a fault of 10 to 12 inches."

Mr. Durkee has this to say about the damage at Warm Springs Landing; "The warehouse and wharf on the slough fell, also Dixon's house. Cracks in the vicinity of Milpitas flowed artesian water for 48 hours after the shock."


Centerville

The stores of C. J. Stevens and J. Salze were destroyed and most of the goods of both stores were lost. The home of Dr. Selfridge was partially destroyed, and his daughter was injured. Bamber's hotel was badly damaged after settling 2 feet. Near Tyson's Lagoon (now Lake Elizabeth), Mrs. Tyson had this to say; "A tank swayed north, then south, and fell. The lagoon parted lengthwise down the middle and threw water and mud both ways.


After the earthquake, the lagoon was dry for 3 years." Another family member, H. Tyson had this report; "A crack went through the old Shinn place, crust the Centerville-Niles road about 0.6 miles southwest of the Southern Pacific Railway track, and passed thru the Tyson Lagoon." Later, J. C. Shinn would report that after the earthquake, his father's home, sitting directly on the fault, was split in two, with one side dropping about afoot. Later analysis would indicate that there was a 30 cm drop along the fault near the Shinn property.


Irvington

In Irvington, Mr. R. B. Croswell reported the following; "Thru the north side of town, a crack split the hillside, opening 7 or 8 inches and showing a fault for 8 or 10 inches. It cost the county road 500 feed north of the Southern Pacific Railway Depot. Its trend was N. 45 degrees to 50 degrees W. From these low hills the crack seemed to pass over into the tule ponds north of town."


Another witness, J. McD. Preston had this to say about the earthquake many years later; "I was then about 15 years of age. My home was near Irvington. When the shock came, I was alone in the house with my baby brother. My mother was in the milk house, about 10 steps from the kitchen door. She called me to get the baby. I was thrown the length of the dining-room, I managed to get the child over my arm, face down, and a pillow on top.


Then, falling and crawling, I worked my way back to the open kitchen door. My mother was on the ground. Every time she tried to get up, she was thrown again, and the milk in the buckets was spilled over her. My two brothers, my stepfather, and the hired man were also down and were trying to get to the house by crawling and falling. 


As I set there, I could see the ground in waves like the ocean. After the main shock, I think we had 100 shocks during the first 24 hours. The ground opened; we traced a crack thru town, and the ground settled several inches in one place. Not a house was left with a chimney on it.


Union City Area

In 1959, Union City was incorporated from the two towns of Alvarado and Decoto.


Alvarado

The brick shop and stable of A. J. Lattin was destroyed. The wooded beams from the stable tumbled in such a way as to shield the horse in the stable from being hit by any falling debris. The brick store building, owned by J. J. Stokes, was destroyed with some loss to its contents. On the property of Mr.nDyer, an 8-foot fissure opened up. Most of the brick chimney's in town were destroyed or damaged. The bridge was damaged by the quake, making it useless.


Decoto

In 1868, Decoto was not quite a setup as a town and was mostly a farming community. As the railroads were built, the town of Decoto would take shape. Mr. Decoto (one of three brothers for whom Decoto was named) had this to say about the earthquake: "Opposite of Decoto a crack appeared about one-third of the way up the slope. It opened 10 or 12 inches at the surface and faulted about as much on the plains side. The level lands waved like the ocean, and the waves seem to approach from the south.


Hayward

The fault runs right through the downtown part of Hayward. Many older buildings show the fault creep evidently. A warehouse holding hundreds of stacked wheat sacks had collapsed, the roof sitting on the sacks. The flour mill of Morse & Heslep's had basically fallen over. The entire building was leaning over to one side at a forty-five degree or more angle, almost like it had rolled over. The roof on the side that was leaning over slid off, exposing the interior of the second floor.


A warehouse across the railroad tracks from the mill was also severely damaged. A wooden house had one section settle so much that there was a slope between the two sections of the house. Pierce's house was also leaning to one side. One side of the foundation had collapsed tilting the other side up. Except for the tilt, the rest of the home was undamaged. A later account from the Hayward Journal had this to say; ".. two people were killed. 


The shocks continued at intervals for days afterward. A great many people slept in tents for weeks following. Not a chimney hardly was standing. The Spoerer Hotel has knocked off its underpinnings and it shook about the plaster from its walls besides smashing the crockery and bending fixtures. 


The flour mill of P. C. Heslep in the lower part of town was overturned and the walls of Edmonson's Warehouse caved in and damaged thousands of sacks of grain. Mrs. Lockwood resided in the house later owned by William Pierce. She was inside when it turned over and landed her in the cellar.


The shock made her crazy. The peculiar phenomena were the old fence long since missing running up the side road to Hayward Hotel back of this office, one or two boards being bent like a bow as though forced together. The ground cracked open to the width of three or four inches and a crack extended from this place to Niles along the foothills. 


People thought the valley was going out of sight and they began to think of the hereafter. Large numbers congregated in Kimball's Grove and Rev. Seymour presided. There was no joke in the matter and the pastor prayed eloquently and appealed to that power above to save them from the expected destruction."


San Leandro

The morning of the earthquake, the Court and County offices, located at Clark and Davis Streets, were not open. Coming early to work, J. W. Josselyn, Deputy County Clerk, was already at work in the Courthouse. When the earthquake struck, he stepped through the front entrance of the building, where he was struck by the falling stone cornice, killing him. Under-sheriff Borein was injured when he was stuck in the head by debris. He was staying in his quarters, next to the jail.


He was able to escape from his quarters, but he left the jail keys behind. The five prisoners were able to be released from the jail after the door was broken down. The attempts to get them out through a window failed. As soon as the earthquake ended, the four persons who were waiting in the County Clerk’s office were able to climb out through a window, over some debris.


The Courthouse was destroyed in the earthquake The Estudillo home was damaged. Store and homes in San Leandro suffered some damage. It was reported that only one brick chimney survived the earthquake. Like further south, fissures opened in the streets and fields. 


The earthquake seemed to affect the local water sources, as the springs near the County hospital stopped flowing, and new springs were created by some of the fissures. The dry San Leandro Creek was soon running with a foot and a half of water in it. After the earthquake, the Court and County offices were set up in the Methodist Church on Hays Street. 


Quick repairs were ordered on the Courthouse. The damaged jail was covered by a wooden building, with iron cells. A fireproof building was constructed for the Recorder's office. The repairs and construction were completed before the end of the year. On January 4, 1869, the Court and County offices were moved in the repaired Courthouse.


At Robert's Landing, R. C. Vosc reported the following; "Our house broke into three pieces, each part falling outward. A boiler of hot water was on the stove, and with the first deafening jolt, the hot water came my way, giving me a bath, I have never forgotten. Horses fell to the ground and men clung to some quince trees nearby.


Captain Peterson, of the steamer San Lorenzo, who is now deceased, was walking along the road to Robert's Landing when he heard a great rumble off across the fields toward San Leandro. He looked quickly in the direction and over a mile away could see the great wave rapidly approaching. He rushed to the side of the road and had caught hold of the fence by the time the shock broke.


Near him on the road, a 6-mule team was drawing a load of grain, and all the mules fell flat and could not regain their feet until the great jolt was over. During the 3 or 4 succeeding days there were 150 shocks; none, of course, with anywhere near the extent of the heavy one."


Oakland

In Oakland, most of the brick buildings suffered some form of damage. Most of the homes were build of wood, so the overall damage was low. Boardman's brick building on Twelfth Street had it's firewall come crashing down, damaging the awning. Mrs. Cord had rushed out of her house and was standing next to the Boardman's building when the firewall collapsed. 


A single brick struck her on the head, causing injury and loss of consciousness. Shattuck and Hillegass's building, where the Police Court was located, was shaken and deemed unsafe for occupation. The selves had fallen in Ratcliff's grocery on Eighth Street. With a crash, the chimney of the "News" newspaper office fell through the Editorial office, missing all inside. The Broadway wharf buckled during the earthquake, causing 50 tons of coal to be spilled into the estuary. Trestles throughout Oakland were misaligned because of the earthquake.


The original home and the guest building of the Peraltas, located at what is now Coolidge Ave. and Paxton Ave were destroyed by the earthquake. Peralta Hacienda Historical Park has concrete markers for the location of the original Peralta home. The Peraltas rebuilt in 1870 with an Italianate The victorian farmhouse which still stands in the Fruitvale district of Oakland. The Peraltas were the original grant owners of Rancho San Antonio.


At the time of the earthquake, construction was taking place on the First Baptist Church of Oakland, at the corner of 14th and Brush. Deacon N. J. Thompson was near the top of the steeple when the earthquake struck, he yelled down to his companions to stop the foolishness and stop shaking the steeple! 


After the initial quake, an order was issued by Mayor Merritt to do a safety check on all chimneys before any fires were lit in them. In the towns of San Antonio, Brooklyn, and Clinton (now part of southern Oakland), the earthquake was felt stronger, causing the railroad to San Antonio to be displaced, and the brick building of Fredrick Schimelpfenings to collapse, with other brick buildings receiving some form of damage.

 

The Deaf and Dumb Asylum was under construction at the time of the earthquake and suffered major damage. Both the side and front walls had large portions fall. The other two walls would have to be torn down and rebuilt. The chimneys were all knocked down. The building, built of stone, was touted as one of the strongest-built buildings in the state.


In his history of Alameda County, Woods had this today about the earthquake in Oakland; "In comparison to the desolation sustained in the neighboring towns, Oakland did not suffer much damage. The casualties in crockery and glassware were very great, and many chimneys were laid low. Portions of the wharves were carried away in some instances, while walls were cracked in almost every house

and deep excitement reigned supreme in every household."

San Francisco

With San Francisco having more brick buildings and more buildings in general, the amount of damage was more extensive than the East Bay, even though the Hayward Fault is in the East Bay. The San Francisco City Hall was so damaged that all business with the City was suspended. The front facade had loose stones, held in by their own weight. Inside City Hall, the walls were cracked with gaping holes in a few places. The upper story of the building was a total loss. The Probate Court and Twelfth District Court, on the first floor, were severely damaged.


At the time the opinions varied about whether the building could be saved or not. During the earthquake, the prisoners were panicking. Because they could not escape from the building, they all feared that the building would collapse around them. Judge Provines called his Court to order to release those held for drunkenness and ordering Captain McElroy to send the other prisoners to the County Jail, which had not received any damage.


On Stockton Street, the center spire on the Jewish Synagogue was thrown down and the rear wall was knocked down. Most of the other buildings on the street had cracked plaster and numerous broken windows. Pickerings drug store and the office of Dr. R. Cole were badly damaged. The glass bottles in the drug store were shattered and strewn about. Several statues of Dr. Coles had fallen and been damaged. He also lost furniture and expensive glassware. At 1323 Stockton St., the building of Mr. Lendhardt, a carpet dealer, was seriously damaged. The front wall was torn off the side of the building and was in danger of collapse.

 

On Pacific Street, those buildings west of Stockton St. did rather well during the earthquake. East of Stockton St. the damage was more severe. The building at the corner of Dupont (Grant Ave.) and Pacific had the rear wall open two or three inches. The building housed a lodging house, two restaurants, a drug store, butcher shop, boot store, grocery store, and bakery. During the earthquake, one of the bakers, in exiting the building, was struck the leg by a falling brick.


Luckily, he was only slightly injured. Bottles and merchandise in the drug store and grocery store were scattered. In Chinatown, then bounded by Kearney, Stockton, Washington, and Pacific, the brick firewall of a building collapsed and smashed a small shanty building in the alleyway. One Chinese woman was struck by falling timber was badly cut on the head. Other firewalls were partially fallen or damaged so badly that they eventually had to be torn down.


On Sansome Street, there were quite a several buildings damaged. Most of the damage was south of Washington Street. At the corner of Merchant and Sansome, the Deffebach & Co. building had its firewall knocked down. The building at the corner of Clay and Sansome, occupied by George W. Clark, wall-paper dealer, was slightly damaged.


A building on the same corner, occupied by a grocery store, the Empire Restaurant, and Kohler's musical and toy store, had its firewall destroyed and windows were smashed. In the rush to get out of the Restaurant, the owner, Mr. Blumenthal, and two other men were severely injured. The building of importers of crockery and glassware, Hayes and Lawton, suffered damage to their stock. Some of the walls of the American Theater building were knocked down. The awning in the front of "The Hole in the Wall" saloon was smashed. The Bank of California at Sansome and California was damaged with stones moved out of their places.


On Washington Street, the perfume dealer, C. Paturel, lost a few bottles and had his windows smashed. The drug store of McBoyle & Co. was badly wrecked, with the shelving thrown down. The windows in the Gros' Drug The store were broken. Mr. Peter Alfritz was struck in the foot by a brick falling from the firewall when he was making his escape from the building of Delaplaine & Co. West of Montgomery Street on Clay Street the buildings were not very damaged.


A few broken windows and cracked plaster were all that could be seen. East on Montgomery, the damage was severe. This was ground that was reclaimed from the Bay. The firewall of the McAllister's building fell, striking a woman pedestrian and breaking her leg. The building of the California Wine Works lost its firewall, burying a forty-year-old Chinese man by the name of King Young and William Strong.


Both were killed by the falling bricks. Mr. Strong was in the Mining Press office and rushed into the street for safety. Those that stayed in the building suffered no injuries. The cigar and tobacco warehouse of A. S. Rosenbaum and the adjacent Railroad House were almost destroyed. The Clay Street ends of these buildings were completely collapsed.


At the Clay Street wharf, the ships swayed back and forth as if on rough seas. The wharves themselves shook and trembled. Piles of wheat and brick fell with some spilling into the bay. The horses on the wharf panicked and reared. All the while, the waters of the Bay looked calm. On California Street, most of the damage was

on reclaimed ground.


At 314 California Street, the clothing factory of S. Reinstein was damaged with the foundation sinking sixteen to eighteen inches. Being a brick building, this kind of damage would cause the building to be rebuilt. The carriage depot of O. F. Willey was also damaged. The building occupied by the Pacific Pump Manufacturing Company and an adjoining one-story building was destroyed. The walls fell, the roof fell in and the floors were out of position.


On Sacramento Street, between Montgomery and Sansome, the damage to buildings was severe. On the Donahoe's Bank building, the plastering was cracked in several places. The building next to it, occupied by John Hodge & Co, stationers, George Stevens, printer, and Levin & Gilmore, tobacconists, had several large openings in the walls. Across the street, the old Knickerbocker Engine House, occupied by A. J. Plate, an arms dealer, settled ten or twelve inches. The building next to it, housing Black, Robbins & Co, paper dealers, Wigmore's furniture, and Turnbull & Smith's printing office, also settled almost afoot. The Deeth & Starr bakery was badly damaged.


On Market Street, the lumber yard of Blythe and Wetherbee had the lumber pile knocked down, but no real damage was apparent. At the box factory of Hobbs & Gillmore, the chimney for the factory engine, collapsed, taking with it about twenty square feet of the roof. Those working under this section of the building escaped any injury. The workers in the factory, about two or three hundred men, rushed from the building. Mr. Seaver, fell over a pile of collapsed lumber, breaking his left arm. 


At the Santa Cruse lime and firebrick depot, bricks were knocked down and broken. The old building of Coffee & Risdon, plus the new building being constructed, was demolished by the earthquake, causing numerous injuries among the construction workers. The ground around the building sank a couple of feet, and a fissure opened up. At the drug store of George Dickey, glassware and other items were damaged.


On Fremont Street, a new building for Wilson and Doble was slightly damaged. The top of the walls came down and the foundation was shattered. The sign for the Pacific Saw Manufacturing Company was thrown to the ground and smashed. Chimneys and furnaces sustained damage at the brass foundry of William Garrett.


At the corner of Mission and Fremont Streets was the Brokaw's Mill, which suffered a significant amount of damage. The most damage was to the storage room for moldings. The street in front of the Mill sank two or three feet. The Union Foundry was heavily damaged. At the center of the building, where a pile of pig iron was sitting, the ground sank a couple of feet. This caused the pig iron to fall against one of the walls, smashing things, and causing a fair bit of damage. A few of the employees were injured because of the earthquake.


At Fremont and Howard Streets, the Gas Works suffered damage. Part of one of the side walls collapsed into the street. Two other walls suffered enough damaged that they had to be demolished. The chimney toppled and caused further damage.


The Customs House, housing Customs, the Internal Revenue Service and the Post Office were damaged. The walls opened up two or three inches, causing the Post Office to close and the Customs work to be moved to rooms occupied by the Internal Revenue Service.


The Marine Hospital at Rincon Point was so badly damaged that it was not considered safe to occupy it. The patients have moved to another, safer, location. At the City and County Hospital, the rear and eastern walls were cracked. The patients panicked and many had to be restrained by the nurses to keep them from fleeing down the stairs and outside.


At the Mission Woollen Mills, the floor settled causing some of the machinery to come out of alignment. Settling also occurred in the boiler house, but no damage was done to the machinery. At the Deaf and Dumb Asylum on Fifteenth Street, the upper portion of the wall was thrown down, falling into the girls' bathroom and out onto the yard. 


The girls had just finished in the bathroom and had left before the earthquake struck. Across the city, various other buildings were damaged or had contents damaged. Many brick walls and chimneys sustained damage. Cracks in walls were found all through the city.


San Jose, Peninsula, and other Areas


San Jose Area

In San Jose, the Presbyterian Church and Moody's Mill were damaged. The Baptist Church, Masonic Hall, Lyon's Store, and many other buildings were slightly damaged. City Hall and the Public Schools reported no damage. The St. Joseph Church was badly damaged in the earthquake. I


n Milpitas, W. Bellou reported the following; "Along Coyote Creek, the ground was cracked from Boot's ranch to the San Francisco Bay, the cracks being on the bayside and following the winding of the creek. As in 1906 much water was ejected from the cracks, and Coyote Creek rose." In Santa Clara, the most damage reported was of fallen chimneys.


The Peninsula

In Redwood City, the American Hotel was damaged, as was the Court House and Public School, which had to be let out early. The firewall on Merrill's Block tumbled down. J. A. Graves relates his experience of the earthquake from San Mateo County. He and his father, with some Chinese laborers, were sacking potatoes in the field when the earthquake struck. The field was within view of San Bruno Mountain. Here is what he said:

 

"All at once my father called to me and said: 'Look at that fool mountain!" Beginning at the northern end, it was dancing up and down. The motion was traveling southerly." "While we were looking, my father again said: 'Look at that freight train!' which was proceeding north on the San Francisco tracks. The train was weaving up and down like a snake. 


The next instant we all saw, coming towards us from the northeast, a wave of earth. It looked to me to be six feet high. When it reached us, we were all knocked down, the sacks of potatoes were overthrown. I felt a particular weakness in my knees and could not get up for a few minutes. I was not frightened. It was some sort of an electric affection of the knees.


My father complained about the same feeling. The Chinamen shouted to each other in terror and as soon as they got on their feet they started towards our home, where they were staying in a small house near the barn. They never stopped at their house, but kept on to the village of Colma, half a mile beyond, where they caught a stage which took them to the streetcar line to the Mission in San Francisco. They did not come back for three days. "


"My father and I sacked and sowed up the potatoes that were dug, gathered the sacks into a pile, covered them with weeds and potato vines, to prevent sunburn, and then went home. When we got there, my mother called to us to come to the milk-room. 


About a dozen pans of milk had been milked that morning. Every pan was empty. They did not turn over. The milk simply splashed out with the swaying motion. ""Between the first shock at 8 o'clock in the morning and midnight, there were thirty-seven distinct shocks, none of them of great severity. My greyhound, Flora, had a warm spot on a hillside, back of the house, where she would lie in the sun and was protected from the wind which came from the ocean but passed over her. 


A short time before any of us felt any of the additional shocks, she would come running to the house whining with terror. I suppose that she was that sense that, lying on the ground, she detected the coming shock before it manifested itself by motion. "

Other Areas

In the Santa Cruz mountains, an eyewitness described seeing the tall redwood trees swaying like "fishing-rods" and the dead limbs came crashing down to the ground. Rocks and boulders were loosened by the earthquake and rolled down the hillside, blocking various roads. It was reported that Pescadero Creek ran muddy for a few minutes, with gases bubbling up. When a match was put to the bubbles, they would flame up for a second, showing that the bubbles came from some flammable gas.


In Gilroy, the earthquake mostly damaged just the local chimneys. In Marin County, the earthquake was easily felt, but the strength was not too great. The chimney at the County Courthouse was damaged. In Petaluma and San Rafael, most of the damage was done to brick chimneys. A large stone building had its front thrown down. One corner of the American Hotel did badly cracked that the building would have to be demolished. 


Grocery and drug stores suffered from lots of broken glass. In Santa Rosa, many brick buildings and chimneys sustained damage. The earthquake was felt as far away as Marysville and Grass Valley, but there were no reports of any damage.














Tuesday 18 August 2020

Who Invented Lie Detector?

 The lie detector or polygraph was invented by John Augustus Larson, a Canadian medical student who unveiled his prototype machine in 1921. Based on William Moulton Marston’s studies on the correlation between blood pressure and emotion. Larson’s Polygraph registered not only cardiovascular fluctuation but also a change in breathing.

Therefore, the result looked convincing, but the diligent Larson never felt that the tests were sufficiently conclusive to market his machine as a bonafide scientific instrument. Moreover, Larson’s assistant Leonard Keeler was less scrupulous. In 1926, he built his own version adding a monitor to detect levels of perspiration and touted it around to various American political parties and law enforcement agencies.

By the late 1930s, the FBI and around a dozen police departments were using his lie detector. Most courts have since ruled polygraph evidence inadmissible, but almost a million tests are still conducted annually by American companies and other institutions.  

How to Fool a Lie Detector?

The American Aldrich Ames, who was exposed as having spied for the KGB between 1985 and 1994, successfully passed a CIA lie-detector test on two occasions. On the advice of his Russian handlers, he prepared beforehand with a good night’s rest, then during the test remained calm and friendly towards the operator. Both times, the polygraph drew a blank.

Faking it? Leonard Keeler advertised his polygraph by claiming that it could identify a genuine kiss. In 1935 he used it in earnest for the first time to question two criminals from Wisconsin. After establishing their guilt, they were duly sentenced.

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Friday 14 August 2020

FREEZE-DRYING – 1906 Improving Food Conservation

Originally developed to meet the needs of biologists, the technique of conservation called freeze-drying - technically known as 'lyophilisation' – was for a long time confined to research labs specializing in pharmaceuticals. It was only after the First World War that it was applied on a large scale to the preservation of everyday foodstuffs.

In 1811 the Scottish mathematician and physicist John Leslie was the first person to change water vapor into ice directly-that is, without passing through a liquid stage in between. Two years later the chemist William Wollaston demonstrated the same process to the Royal Society in London. It did not occur to either of them that this effect might one day be used for the preservation of food.

Almost a century later, on 22 October 1906, Arsène d’Arsonval presented a research paper to the Academy of Sciences in Paris entitled 'On distillation and desiccation in a vacuum by means of low temperatures'. Written with the help of an assistant, F Bordas, in the biophysics laboratory that D'Arsonval ran, the paper addressed the subject. 

That was preoccupying many biologists at the time: how to preserve samples of tissue, serum, germs, and other substances used in research. D’Arsonval had devised a technique of freeze-drying. Three years later an American, Leon Shackell, rediscovered the process and developed it.

Stages in The Process

Freeze-drying involves three stages. First, the sample is frozen solid. Second, it is subjected to sublimation – a process that transforms a solid into a vapor without going through a liquid phase. By this stage, the sample has lost most of its water through evaporation, with no heat involved. Finally, to rid the sample of any residual water, it undergoes a secondary desiccation process, in which the temperature is raised slightly, although still usually staying below zero.

The end product is almost totally dehydrated but retains structure and color. Crucially, many of the biological functions recover once the sample is rehydrated since freeze-drying does not damage the molecular structure or cell tissue. Neither ordinary drying nor freezing alone produce such a satisfactory result.

Impact of the War

Because of its cost and complexity, freeze-drying was long restricted to scientific laboratories. This changed in the 1930s. With another world war looming, there was an urgent need to be able to stockpile large, transportable quantities of blood plasma for transfusions to casualties.

From 1935, the American Earl W Flosdorf published the results of his efforts to freeze-dry human blood serum and plasma for clinical use. The desiccation of blood plasma from a frozen state, performed by the American Red Cross for the US armed forces, was the first extensive use of freeze-drying.

Flosdorf, together with researchers in Britain under Ronald Greaves, pioneered large-scale commercial freeze-drying of foodstuffs at this time. Meanwhile, Ernst Boris Chain, the co-discoverer of penicillin, initiated the lyophilisation of antibiotics and other sensitive biochemical products.

From Drugs to Freeze-dried Coffee

At the end of the war, the pharmaceutical and cosmetics industries adopted freeze-drying for vaccines, drugs, and other preparations. Freeze-dried coffee, which had been brought to Europe by American GIs, helped to stimulate the freeze-drying of foods.

At first, because the process was still very costly, it was only used for luxury items. But before long freeze-dried soups, spices and even entire prepared meals appeared in packets on grocers’ shelves. In the 1960s NASA adopted freeze-dried meals for astronauts on its space programmed.

PROS AND CONS

Most micro-organisms need water to survive and grow; provide almost the same nutritional value as fresh versions. The main freeze-drying is very effective at the disadvantage of freeze-drying is it preventing the growth of microbes and inhibiting harmful chemical relatively high cost, which has hampered the full development of the technique even to the present day. reactions.

The use of freeze-dried products in the Second World War Also, while freeze-drying commodities demonstrated the huge benefits, they such as coffee and tea, which have no offer in storage and distribution. If cell structure, is successful and cost-effective, other products do not fare so well.

It is especially hard to properly freeze-dried, most foods, either raw or cooked, have a long shelf life even at room temperature sublimate all the water vapor from foods with abundant cell membranes and can be reconstituted simply by adding water; the resulting in products like meat, vegetables, and fruit.

INCA KNOW-HOW

Father José d'Acosta, a Spanish Jesuit priest I on a mission in Peru, reported in 1591 that the Incas conserved food crops by carrying them up into the Andes above Machu Picchu. There, the combined effects of the cold, the Sun, and the relatively low atmospheric pressure at high altitudes caused the water in the food to sublimate. The resulting products, which the Incas called charqui (dried meat) or chuno (dried potatoes), were the earliest known freeze-dried foods.

Monday 10 August 2020

Albert Einstein Biography

 
The archetypal genius in the popular imagination, Albert Einstein was a maverick thinker who turned the laws of physics upside-down while sticking out his tongue at the world. But the man behind this mischievous mask was a mass of contradictions.
His family was scared that something was wrong with him. He had a very large image shape and head, but fortunately, within the first few weeks, the shape of his head became normal. However, their worries didn't stop there, when he was very young. His parents thought he might be intellectually disabled because he was very slow to learn to talk and did not speak until he was four years old.
So, at that time he often formed full sentences in his thoughts but did not speak. He used to practice the sentences in his head or whisper them softly under his breath, until he got them right, and then see them aloud. Many people believed, Einstein would never succeed at anything when he was five years old. His father showed him a simple pocket compass and Einstein was fascinated.
And that was the beginning of his obsession with science. He also began playing the violin, at the age of six and would continue to play throughout his life at school, Einstein was a good student, most of his grades were high, and he was near the top of his class. But mainly because of math and science, so his grades depended mostly on his interest in the subject when Einstein was only 10 years old. He started, educating himself by the age of 12.
Einstein taught himself geometry in by the age of 15, he mastered calculus, but he hated the discipline ridged style of the teachers. So he dropped out of school at the age of 15 and left Germany to avoid military service. His parents were worried that their son became a school dropout with no employable skills and not a very promising future.
However, Albert Einstein did not quit his education. He applied to the Swiss Federal Institute of Technology. And believe it or not, he failed the entrance exam, Albert Einstein failed an exam. Well, he wasn't prepared; he excelled at math and physics, but his knowledge of subjects. Other than that was not good. So he failed the exam and had to take it a second time.
Before publishing his groundbreaking papers on physics, at the age of just 26, he had been an underachiever both at school and college. He was a mediocre student who never did any practical experiments. His initial theory was based largely on intuition.
The contrast between the popular assessment of my powers and achievements and the reality is simply grotesque', wrote Albert Einstein in 1931.
Perhaps the great thinker had some foreboding of the macabre scenes that the genius cult surrounding him would provoke following his death on 18 April 1955. No sooner had the 76-year-old physicist passed away at Princeton Hospital, New Jersey, than the pathologist, Dr. Thomas Stoltz Harvey, removed his brain during the autopsy, without permission, in the hope of discovering what it was that made Einstein so extraordinary.
As it turned out, the brain weighed 200 grams less than average. Its only unusual feature was that the left hemisphere was more highly developed than in most people. This was to the detriment of the part of the brain which controls language, which is consistent with the fact that young Einstein was a slow developer. He was only acquiring speech relatively late in childhood.
And then he was admitted. There he met his future wife mid-level marriage; she was the only woman among the six students in that section. After finally graduating, he couldn't get a job in academia. For almost a decade, every one of his professors knew that Albert was brilliant, but they were also bothered by his rebellious and disobedient side.
So they refused to recommend him for various positions, so the academic institutions wouldn't hire him, but the young Einstein needed money so he got a job as a clerk in a patent office, the job was mostly mindless and very easy for Einstein, so he liked the job because he had so much free time to study and research.
While working there, and he developed his most important theories while working his boring job. He developed the theory of relativity, and the world's most famous equation, Einstein was nominated for a Nobel Prize but did not receive it, until 11 years later. Albert Einstein became the most influential physicist, of the 20th century. His research changed the world.
He wrote hundreds of books and was also a great philosopher, so there are so many things to be learned. I have no special talent. I'm only passionately curious, so follow your curiosity, whatever that is, sees where it goes. Never be afraid to question the world around, and don't be afraid of failing and making mistakes along the way a person who never made a mistake. Also never tried anything new there to discover in there to make mistakes. That's what divides successful people from unsuccessful, don't be afraid to conquer your fears, and don't be afraid to follow your passion. You don't have to be the next Einstein, be the.
Albert Einstein was born on 14 March 1879, to a non-practicing Jewish family in the southern German city of Ulm. From an early age, he displayed great powers of concentration and an aptitude for original thinking. As his sister, Maja recalled 'even when there was a lot of noise, he could lie down on the sofa, pick up a pen and paper and engross himself in a problem so much that the background noise stimulated rather than disturbed him'.
At the age of 5, he was already showing, more interest in the compass owned by his engineer father Hermann than in the violin lessons he received from his mother Pauline. Albert was a solitary and quick-tempered child, who later learned to adopt a dreamy air of detachment to anything that threatened to disturb his work.
He formulated his Theory of Special Relativity by thinking up imaginary scenarios and devising thought experiments, in the mold of Galileo and Isaac Newton, two of the scientists he most admired,
Self-taught Physicist
After enrolling at the Zurich Polytechnic Institute in 1896, the 17-year-old Einstein began to come out of his shell. During his time there he met Mileva Maric, a brilliant mathematician, whom he married in 1903. Three years earlier he had passed his exams in mathematics and physics, but it was largely through his own efforts that he acquired a thorough knowledge of e developments in physics. He struggled to make ends meet during this phase of his life, but it was also a time of great intellectual Endeavour and achievement for him.
In 1901 Einstein took technical assistant (third class) at the Swiss Federal Patent Office in Bern, a lowly position that happily left him plenty of time to think and pursue his own scientific investigations. Just four years later, as a complete unknown, he published his article on special relativity, which stirred the learned world of physics and laid the foundations for quantum theory.
There followed, in 1915 and 1917 respectively, works on the general theory of relativity and on its application to cosmology, It took time for Einstein's theories to be widely accepted: even the Nobel prize that he was awarded in 1921 made no mention whatsoever of relativity. In an attempt to win over reluctant fellow scientists, Einstein embarked on an extensive lecture tour around Europe in the 1920s. It was at this time that his work first came under attack by anti- Semitic elements, who decried his theories as 'degenerate' and tried to smear him with accusations of plagiarism. But by now his reputation was too firmly established.
The A-bomb and quantum physics
With Hitler's rise to power in Germany in 1933, Einstein went into exile in the USA, taking up a research post at the University of Princeton, In 1939, despite his fundamental pacifist beliefs, he urged President Franklin Roosevelt to develop the atomic bomb for use against the Nazis. But by 1945, he regretted his involvement in its development.
On the eve of the bomb's deployment against Japan, he begged President Truman to think again. Einstein was also at the forefront of quantum physics in the 1930s, even though he rejected the uncertainty principle at its heart (formulated by German physicist Werner Heisenberg) with the famous statement 'God does not play dice'. After the war, Einstein stepped back from the limelight but continued his researches. At his death, he was working on a Grand Unified Theory that would embrace all the fundamental laws of physics. His successors are still engaged in that quest. A
Cult Figure
Everyone knows the famous picture of Einstein the tousle-headed iconoclast, poking his tongue out at the camera. This was just one of many faces of a man who, by turns, epitomized the absent-minded professor the melancholic loner, the laughing genius and the selfless scientific pioneer. Einstein became every bit as much a universal archetype as Mahatma Gandhi in the political arena and Pablo Picasso in the world of art.
College sweetheart Einstein's first wife was Mileva Maric, a young Serbian mathematician. She is pictured here in 1914 with their sons Eduard (left) and Hans Albert.
Into exile
Einstein playing the violin on his return voyage to Germany on the liner Belgenland in early 1933. When be learned that Hitler was the new German Chancellor. Einstein got off the ship at Antwerp and went back to the USA, where he stayed for the rest of his life.
US citizen
On 1 October 1940, Albert Einstein, his secretary Helen Dukas (left) and his stepdaughter Margot (right) swore the oath of allegiance to the United States of America and became naturalized US citizens.