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' U.S.COAST SURVEY, A.D. BACHE SUPERINTENDENT 
DIAGRAMS ILLUSTRATING EARTHQUAKE WAVES OF DECEMBER 238rd.1854 AT SAN FRANCISCO, SAN DIEGO AND ASTORIA 
FROM CURVES RECORDED ON SELF REGISTERING TIDE GAUGES | 
1855 
* 
Comparison of Heights 
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Curves at San Francisco and San Diego 
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‘Comparison of Times 
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Mean Heights 
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‘ : : In Diag 1&H the full lines retér to the heights and times of the first ; 
sertes, the broken lines to th fthe second series. The strong lines refer 
x : to San Fi J i the faint ones to San Diego. In Diagrams C&D the 
; : full lines yefer to San Francisco, and the broken ones to San Diego. 
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Diagram of Oscillations in the level of the Sea: at San Francisco-and San Diego 
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