U. S. GEOLOGICAL. 3URVEV 
BULLETIN NO. 324 PL. XLVI 
W- IhPWffet 
Li.- '- Jt'£ 
yl. BRICKWORK THROWN DOWN BY EARTHQUAKE VIBRATION, 
TOWER OF UNION FERRY BUILDING, SAN FRANCISCO. 
Note bending of time-ball shaft. Photograph submitted by Richard L. 
Humphrey. 
/;. EFFECT OF SEVERE SHAKING ON WELL-BONDED BRICKWORK FILLED WITH GOOD 
MORTAR, TOWER OF UNION FERRY BUILDING. 
Note sagged tie-rod, stretched by the racking of the structure. Photograph by John Stephen Sewell. 
