U. S. GEOLOGICAL SURVEY 
ULLETIN NO. 324 PL. XXXV 
A. INCIPIENT BUCKLING OF COLUMNS FROM HEAT, FIRST 
STORY, JAMES FLOOD BUILDING, SAN FRANCISCO. 
The brick filling probably saved the columns from fatal buckling 
or collapse. Photograph by John Stephen Sewell. 
B. FAILURE OF SUSPENDED CEILING, HALL OF JUSTICE, SAN FRANCISCO. 
Photograph by Richard L. Humphrey. 
