n; 



Jamieson and Bingham — Lake Parinacochas. 



Sodium chloride 9324'0 



Sodium sulphate 049-3 



Sodium borate 212-4 



Potassium sulphate 965-0 



Potassium nitrate. 78-0 



Calcium sulphate 435-8 



Calcium carbonate. . 33-8 



Magnesium carbonate. ... 342-8 



Ferric phosphate 9-3 



Silica 8-0 



12,059-0 



In order to compare the percentage composition of Lake 

 Parinacochas with that of the Atlantic Ocean and several other 

 typical saline waters, the following table is given. The analy- 

 ses were taken from Bulletin No. 330 of the United States 

 Geological Survey, entitled " The Data of Geochemistry," by 

 F. W. Clarke, 1908 : 



Water 



CI 



1. Lake Parinacochas 



2. Soda Lake, Nevada 



3. Atlantic Ocean 



4. Great Salt Salt... 



5. Lagoon of Tamun- 



tica, Chile 



6. Koko Nor, Tibet.. 



46-86 

 3651 

 55-48 

 55-69 

 50-44 

 4005 



so 4 



C0 3 



PC, 



B 4 7 



Na 



K 



Ca 



Mg 



S,0 2 



N0 3 



Fe 



10-59 



214 



005 



1-36 



32 63 



8-85 



1-18 



0-82 



0-07 



0-40 



03 



10-36 

 7-69 

 652 



9-17 



13-78 



0-21 

 trace 



.... 



0-25 

 trace 



36-63 

 30 60 

 32-92 

 35 35 



2 01 

 1-10 

 1-70 

 2-29 



trace 

 1-20 

 1-05 

 01 



0-22 

 3-72 

 210 

 0-60 



64 

















.... 



2-14 



_ _ _ _ 



1784 



5 53 



002 



.... 



3060 



1-08 



1-77 



2-90 



09 











Total 

 Salinity.' 



12,059 



113,700! 



34,400* 

 230,355 

 285,500 ' 



11,000* 



Analysts: 1, G. S. Jamieson; 2, T. M. Chatard ; 3, G. Dittmaes ; 4, E. Waller; 

 5, F. San Roman ; 6, C. Schmidt. 



* An approximation only. Not given in the Bulletin. 



On comparing the percentage composition of the several 

 waters given in the table above, it is seen that Lake Parinaco- 

 chas occupies an intermediate position. Its salinity is about 

 one-third that of the Atlantic Ocean, or about one-twentieth 

 that of the Great Salt Lake. It is also noticeable that it contains 

 much more carbonate and much less magnesium than either the 

 Atlantic or the Great Salt Lake. 



Yale University, New Haven, Conn., 

 April, 1912. 



