146 T. M. Chatard — Analyses of Alkali Lake Waters. 



No. 7. 



16,250 343x10 9 



4-22 - 



- 3-10 



= 



1-36 



•848 



9,320 454xl0 9 



2-99 - 



- 1-78 



= 



1-68 



* 907 I 919 

 .93lj yii > 



8,550 473xl0~ 9 



2-79 - 



- 1-63 



= 



1-71 



4,900 (July 3.) 













1-75 







The last column shows that with fields of medium strength 

 the relatively greater transverse effect in the thick cross corre- 

 sponds closely to the more intense magnetic induction through 

 this cross. 



The difference between the second and third values for No. 

 5 in this column, and also that between the second and third 

 values for No. 7, must be regarded as mainly accidental, a 

 fact which shows the need of caution in drawing numerical 

 conclusions from this series of results. It appears, however, 

 that the transverse effect in the thin cross, No. 5, maintains 

 a nearly constant ratio to the magnetic induction through the 

 same when the magnetizing field is increased from about 

 9000 to more than 16,000 ; but that with a similar increase 

 of magnetizing field the transverse effect in the thick cross, 

 which attains an extremely high degree of magnetization, does 

 not increase enough to maintain unchanged its ratio to the 

 magnetic induction through the cross. 



(To be continued.) 



Akt. XV. — Analyses of the Waters of some American Alkali 

 Lakes; by Thomas M. Chataed. 



In the course of the geological examination, by the TJ. S. 

 Geological Survey, of the Great Basin or country lying be- 

 tween the Rocky Mountains and the Sierra Nevada, samples 

 of the waters of most of the lakes of that section were collected 

 and sent for analysis to the laboratory of the Survey. Many 

 of these analyses were published in Bulletin No. 9, TJ. S. Geol. 

 Survey, but when I began a special study of the more import- 

 ant sources of natural alkalies, for the purpose of preparing 

 the way for their practical utilization, a re-examination was, in 

 some cases, deemed advisable and samples were also obtained 

 from Owen's Lake, California, a locality not visited by the 

 Great Basin party. 



The four analyses here given represent the most important 

 alkali lakes so far known and as the waters of two of them are 

 now. being utilized, it is believed that the information will 

 prove of interest. 



The analytical methods used are, in general, well known. 

 The carbonic anhydride was, in all cases, determined by dis- 



