PLATE 88 
A. Frame building on west side of Eleventh Avenue, just south of California Street, San 
Francisco, A weak structure, built on sand. H, 0. W. 

C. Russ Street, between Folsom and Howard Streets, San Francisco. Paving blocks forced 
up into sharp arches and dislodged by compression. H. 0. W. 

D. Moss Street, between Folsom and Howard Streets, San Francisco. Paving blocks archt 
by compression along sinuous crest, curbing thrown into an inverted V. H, 0. W. 
