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ANNALS NEW YORK ACADEMY OF SCIENCES 



variations of the northern plateaux a^s well <is of those of the Gulf. A 

 certain similarity with the curve of Aachen (Fig. 11) is undeniable. 

 Some other localities of the middle states would give perhaps even a 

 better example of an unsettled variation. 



Figure 56, on which the consecutive curves of Eureka, Los Angeles, 

 El Paso and Corpus Christi are reproduced, shows that on the Pacific, as 



Fig. 54. — Temperature variation of Montana {Miles City) compared with that of 



Maine (Eastpiirt) 



well as on the Atlantic, the pleionian varialioiis are very pronounced, 

 presenting a striking difference with northwestern Europe. Moreover, 

 the curve of Eureka is similar to the Arequipa curve, and even shows 

 exceedingly interesting small details of the Arequipa curve, details which 

 cannot be ascribed to chance circumstances. It is also worthy of note that 

 the Eui'eka variation is in advance of that of Arequipa. The pleionian 

 crest of 1904-1905 is evidently out of the question. This pleion appears 



