2 EARTHQUAKES ON THE PACIFIC COAST 



The present volume reprints the pamphlet of 1887, with many 

 corrections and additions; and it gives a complete account of the 

 earthquake observations at Mount Hamilton during the years 1887 

 to 1897, together with an abstract of the great amount of informa- 

 tion which has been collected regarding Pacific Coast earthquakes 

 in the latter period. All previously printed information has been 

 thoroughly revised before its admission to these pages. 



The chief sources drawn upon are — 



First — Printed lists of earthquake shocks in the scientific jour- 

 nals; such as the lists of Mallet, Perrey, Rockwood, Fuchs, Trask 

 and others. 



Second — Accounts of earthquakes in printed books, magazines 

 and newspapers. 



Third — Lists of shocks put at my disposition by various gentle- 

 men, especially a list by Mr. Thos. Tennent, of San Francisco; a 

 list by Prof. H. G. Hanks; and a very extensive collection kindly 

 furnished by Mr. H. H. Bancroft from manuscript records. 



Fourth — Verbal accounts from various friends of the Obser- 

 vatory. 



Fifth — The earthquake records of the University of California 

 (Berkeley); the Chabot Observatory (Oakland); the University of 

 the Pacific (San Jose); Mills Seminary (Oakland); the Weather 

 Bureau (Carson, Nevada); and of the Lick Observatory (Mount 

 Hamilton). All these stations are supplied with earthquake 

 instruments. 



I have to thank Professor Eockwood, of Princeton University, 

 for putting me in the way of gaining much of the printed informa- 

 tion. I have also to express my great obligations to the Board of 

 Directors of the Mechanics' Institute Library, to the Council of the 

 California Academy of Sciences, and to the Librarians of the 

 Mechanics' Institute, Mercantile and Academy of Science libra- 

 ries in San Francisco, the University of California Library at 

 Berkeley, and of the State Library at Sacramento, for exceptional 

 facilities afforded me in the consultation of books. Mr. W. C. 

 Winlock, late of the Smithsonian Institution, kindly consulted, 

 in the Library of Congress, books which were not available in Cali- 

 fornia. The various sources of information have been thoroughly 

 examined, and the necessary data for a brief reference list, or index, 

 have been extracted and set in order in the catalogue which follows. 



