184 REPORT OF THE CALIFORNIA EARTHQUAKE COMMISSION. 
(George Madeira.) In the bed-room a heavy walnut and marble composite bureau, 
mounted on rollers and weighing 400 pounds, was moved toward the center of the room 
by the first wave motion, which was north to south. It then turned so that the large 
mirror surmounting it was due north. In the house are three chimneys built close to- 
gether. One chimney above the roof fell to the south; but beneath the roof one fell to 
the south, one to the north, and one to the east, on the ceilings of the back parlor, dining- 
room, and sitting-room respectively. <A large pier glass 8 feet high, with a very heavy 
marble base, was turned northward. There were two maxima in the shock and the 
second was the more violent. The first was from north to south and the second from 
east to west. Not a building escaped damage to some extent, whether made of wood, 
brick, or stone. There were five brick buildings destroyed. Mr. Madeira estimates the 
loss at between $200,000 and $300,000. Along the creek and river bottoms the earth was 
fissured and water was forced up which, in some instances, flooded the orchards. 
Alexander Valley to Mt. St. Helena (R. 8. Holway). — This trip was made in order to 
cross the line of the fault described by Mr. V. Osmont* on the southwest slope of the 
mountain. No sign of recent movement was seen, however, and no reports of cracks or 
landslides were obtained. There are few houses from which to obtain reports. Some 
chimneys fell as far as Kellogg at the foot of the mountain. At Nays — elevation 
about 1,500 feet —and at the toll-house southeast of the summit — elevation about 
2,300 feet —a severe shock was reported, but nothing was shaken down. In climbing 
the last 2,000 feet to the summit, large boulders were frequently seen balanced on points 
and yet not overturned by the shock. The intensity decreased from IX at Healdsburg 
to about VI on top of the mountain. 
Alexander Valley is part of the Russian River Valley lying east of Lytton Springs. 
The main bridge across the Russian River was wrecked, the trestle-work part going down. 
The bridge was old and was to have been rebuilt this year. At the east end of the bridge 
cracks cross the road, northwest to southeast, parallel to the river bank. These cracks 
appear at intervals northwesterly, at least as far as the ranch of Rev. E. B. Ware, about 
a mile up the river. The cracks vary from a few inches to over a foot in width, and are 
sometimes 200 to 300 feet long, roughly parallel to the river. Mr. Ware states that the 
shock threw the river water upon the sandbars to such an extent that he found fish there 
during the day. Other cracks are reported a mile or two northward. Subsidence fre- 
quently occurs where the cracks are near the bank. 
Cracks in the Russian River Flood-plain (R. 8. Holway). — Cracks have been observed 
at intervals in the alluvial banks of the Russian River from near its mouth to Alexander 
Valley, 5 or 6 miles northeast of Healdsburg. These cracks are sometimes 100 yards in 
length and from a few inches to 2 feet in width. Sometimes near the bank there will be 
a deep fault 5 to 6 feet in width and 100 feet long, as shown in the photograph of the crack 
at Monte Rio. The direction of the cracks is usually parallel to the bank of the river or 
the bank of some small tributary. At Duncan Mills the cracks ran north and south above 
the bridge and nearly east and west just below the bend of the river. At Monte Rio 
they are east and west. In Alexander Valley they run north and south, while a mile or 
two below some are found nearly east and west running up a small tributary. 
Maacama Slide, 6 miles easterly from Healdsburg (R. S. Holway). — This slide is on 
the north side of a ridge that runs in an easterly direction and that is at this point from 
225 to 300 feet above the bed of Maacama Creek, which runs along the foot of the north 
slope. Mr. Hugh Simpson, whose house is just beyond the foot of the slide, states that 
the entire slide took place at the instant of the earthquake. The slide is about 0.125 
mile wide at the top and about 0.5 mile long. The rock is a very light, porous, voleanic 



1 Bull, Dept. Geol., Univ. Cal., vol. 4, No. 3. 
