ISOSEISMALS: DISTRIBUTION OF APPARENT INTENSITY. 313 
scious of the movement of their own bodies in the same direction. Milk in open vessels 
left a coating of cream highest on the northwest and southeast sides, although in many 
cases motion was also shown east and west. 
While there is not entire agreement with reference to the east and west vibrations 
during the latter part of the shock, the larger number of observers plainly felt and saw 
their effects, and the evidence as to their occurrence seems conclusive. Doors swung 
east and west; swinging objects, such as drop-lights, hanging baskets, etc., were found 
either swinging east and west or in circles after the shock, and pictures hung on north 
and south walls of rooms showed lateral motion during the latter part of it. Tanks in 
several cases spilt water east and west, although not in such quantities as in the other 
directions. 
The following table indicates the effect of the shock on the 128 clocks concerning which 
reports were received : 



Orientation. abt ceitee Stopt. Not Stopt. 
Facing west . . 32 17 1b 
Facing north . . 36 18 18 
Facing east .. 27 13 14 
Facing south . . 33 16 ity 
LOtala eae sans 128 64 64 





Clocks with very long or very short pendulums were generally not stopt. Two town 
clocks were not stopt. One of these, which, through the courtesy of Mr. E. B. Condy, 
I was permitted to examine, is in the tower of the county court-house. Its frame stands 
northeast and southwest; and its 100-pound pendulum, hung on the northwest side of 
the frame, swings northeast and southwest, missing the edge of the iron stand about 
0.5 inch. A deep scar in the mahogany pendulum bar indicates that during the shock 
the pendulum swung sharply to the southeast, its bar striking the edge of the iron stand. 
The weights of the same clock hang in a narrow shaft at the side of the tower. The 
wire pulley cords which support the weights were found so badly twisted as to interfere 
with winding the clock a day or two after the earthquake. On the inside of many 
clock-cases are found scars made by the striking of the pendulums. These scars are 
deepest on the south side in clocks facing east or west, and on the west side in clocks 
facing north or south. 
Some persons who were outdoors during the shock claim to have heard a dull rumbling 
sound immediately preceding it. They find it difficult to describe the sound accurately, 
and in some cases think it may have emanated from nearby buildings. A considerable 
number of people suffered from nausea and dizziness, with headache, for a time after the 
shock. With some these disagreeable symptoms persisted all the following day. 
Farmington, San Joaquin County (J. F. Gwin). — The house quivered, then the sash 
weights of the windows began striking back and forth, and a heavy rolling motion was 
felt which caused open doors to swing back and forth. The clock stopt. The surface of 
the ground moved in waves like water, and trees moved with the ground. 
Central San Joaquin County (E. P. Higby). — In Ranges 6 and 7 E., townships 1 and 
2.N., Mount Diablo Meridian and Base line, there were apparently 2 maxima of equal in- 
tensity with intervals of a few seconds between. The apparent direction was SW. to NE. 
No objects nor chimneys were overthrown. The bed shook, and chandeliers, pictures, open 
doors and shutters were caused to swing. Windows and window weights rattled. The 
clock did not stop. Paper on the walls was cracked. The slate roof on a high church 
tower was cracked. There was scarcely a breath of wind, yet large trees swayed and bent 
as if rocked by a terrible gale. Water in the wind-mill tank and in other tanks slopt 
