4-ieba 





UNIVERSITY LIBRARY, 

 «i SKELET. CALIf tRNiA. 



PAC] F I i 



SCI I*:\CE MONTHLY, 



M \k', ii. 



American Earthquakes. 



H> Pr.,f Kit-hard Ovea I I. |. 



Ginj Ian or gei 

 principle, regulating the distriba- 

 111 time .mil (pace, of American 

 earthqoab udeavoriiig U> 



answer thie question. attention may be 

 direi • tain papers leading to 



alizations, ou II 



i by the pre* 

 •nt writer, at varioui times, chiefly to 

 the A \ \ ( ; ami published in their 

 Without specif) ing 

 their generalizations may be 



■ ader mori iutelligible the 



i. in. irk- .in Unericau carthquaki 



I Tbe earth deriving its existence 



• on li nuance h ■ habitable plan 



nerally think) from 



the sun, ii tl„it t ,.,.. 



should still be de- 

 pendent on solai manifestations mid 

 tli>'ir modifying iiifloen 

 II. As light, heat, eleclri 

 ■ii. chemi ami net 



■y arc all convertible mode 

 cnlar motion, ami we derive our 

 lighl and heat from the sun, it - 



able that we derivi din lly or in- 

 tlv, all th< ,rius oi motion 



including 



TV Co 



•Pat 



mologicnl Impi 



IM. In confirmation 

 ments, lei us examine the relation <>( 

 continents, in their configuration, to 

 I rotation and that of revolu- 

 tion or progression oi the earth in l»*-r 

 orbit [f we pass two great circles 

 through the poles "f rotation, and 

 make one of them cul also verticallv 

 through the Caspian sea, and the 

 other he at riglil angles to c 1 1 • - f< 



ntly tout- bin a South Amer- 

 ica in about the meridian of Pi 



Sud oui globe divided into 

 four segments dike the four quart 

 an orangoor apple) by lines of d< 

 si. .ii. purattel to tht aat$ of rotation ; 

 and each segment will In. found to 

 sontain a donble continent, pro' 



msider the isl.-s ,,f the Pacific as 



indieating the summits ol mountains 



in a sunken continent Thus one (the 



central segment) contains Buropi and 



Al'ri. ,.|. , m !!„. „.,.»,_ \,, r (l| 



and Booth Wn third, on the 



Ilia and Australasia : a fourth, 



opposite Europe and Africa, may be 



•iair.1 North ami South I 



IV. Bui beside this plain 



shrinkage, al the division lines of four 



and elevation of continents 



bmughl about an 



inclination ,.i thi rotation 



(amounting at present to about 23 



