ILLUSTRATIONS. 
(All the plates will be found at the end of the bulletin.) 
Plate I. Earthquake effects along the fault trace: A, Road crossing fault 
trace near Point Reyes station ; B, Fence parted by earthquake 
fault. 
II. Redwood tree on line of fault south of Fort Ross, showing earth- 
quake effect along the fault trace. 
III. Fault trace near Point Reyes station. 
IV. A, Secondary cracks, shore of Bolinas Lagoon; B, Secondary cracks, 
with settling, Bolinas. 
V. Results of earth flow, Ninth street, San Francisco. 
VI. Earthquake effects on "made ground:" .4, Settling on Dore street; 
B, Buckling caused by earth flow, Howard street. 
VII. Shifted bottom of Tomales Bay : A, General view ; B, Edge of new 
shoal. 
VIII. A, Earthquake ridges on tidal flat, Tomales Bay; B, Slipping of 
alluvial soil toward a river. 
IX. Damage to Pilarcitos 30-inch pipe line by earthquake. 
X. A, Collapsed 30-inch wrought-iron pipe near trestle crossing the 
fault ; B, House on line of fault, torn asunder by earthquake. 
XI. A, Racking and spalling of concrete pier due to earthquake move- 
ment ; B, Endurance of concrete dam near fault trace at Crystal 
Springs Lake, San Mateo. 
XII. A, Effect of earthquake on a brick building near Salinas (Spreck- 
els's sugar mill) ; B, Earthquake wreck of Hall of Justice, San 
Jose. 
XIII. A, Comparative earthquake endurance of dissimilar structures near 
San Jose; B, Earthquake effect, high school building, San Jose. 
XIV. A, Comparative behavior of reenforced concrete and brickwork under 
earthquake vibration ; B, Complete wreck by earthquake at Santa 
Rosa. 
XV. Endurance of steel framework as affected by method of support, 
Leland Stanford Junior University : A, Undamaged steel frame- 
work supporting dome of library ; B, Collapse of brick walls causing 
destruction of steel skeleton dome of gymnasium. 
XVI. Memorial arch, Leland Stanford Junior University: A, Before the 
earthquake ; B, Earthquake effect. 
XVII. A, Collapse due to lack of tie between walls and frame; B, Col- 
lapsed tower and general earthquake wreckage. 
XVIII. A, Earthquake damage due to lack of tie and bracing; B, Earth- 
quake effect on arches. 
XIX. Earthquake effects on cement-block walls . A, Endurance of walls 
tied together with steel rods; B, Wall thrown down by earth- 
quake vibrations of roof trusses which were not tied to wall. 
VII 
