U. S. GEOLOGICAL SURVEY 
BULLETIN NO. 324 PL. 
A. EARTHQUAKE DAMAGE TO BRICK STACK OF STAR SEC- 
TION, VALENCIA STREET POWER STATION, SAN FRANCISCO. 
Showing peculiar crack in reentrant angle. Photograph by Richard 
L. Humphrey. 
]!. GENERAL EARTHQUAKE EFFECT ON FRAME BUILDINGS SITUATED ON ALLUVIAL SOIL 
HOWARD STREET, SAN FRANCISCO. 
Photograph by A. C. Lavvson 
