Grams per Liter 



Total solids (at 110).. 8.5666 



Total solids (at 210) . . 8.1467 



Total solids (ignited) e.. 7.6400 



COy none 



HOO 3 7 0.2187 



Mineral Analysis 



Per Cent, of 



Grams Total Solids 



per Liter (Ignited) 



SiO 2 0.0720 0.94 



FeAAlA 0.0030 0.04 



Ca 0.3305 4.33 



Mg 0.2560 3.35 



Na 1.9750 25.85 



K 0.3050 3.99 



Ol 3.4120 44.66 



SO 4 . , 1.3260 17.36 



CO 3 s 0.1075 1.41 



Total 777870 10L93 



Hypothetical Inorganic Composition of the Solution 



Per Cent. 

 Grams per Liter of Total 



Na^SiQ., 0.1460 1.84 



Ca(HCO 3 ) 2 0.2913 3.68 



CaSO&amp;lt; 0.8780 11.08 



MgSO 4 0.8855 11.18 



MgCl 2 0.3023 3.81 



KC1 0.5875 7.42 



NaCl 4.8330 60.99 



Total 7T9236 166700 



There was apparently considerable organic mat 

 ter in solution. This could easily be derived from 

 bat guano which was observed on the lava ledges 

 surrounding the pool. 



7 Carbonates and bicarbonates were determined 

 by the titrametric method proposed by Scales 

 (SCIENCE, N. S., 51, p. 214, 1920). 



s Calculated from bicarbonate data according to 

 the formula 2RHCO 3 + heat = BjCOs + C0 2 + H 2 O. 



9 An average value based on NaCI contents of 

 4.8790 gr. calculated from residual Na and 4.7870 

 calculated from residual Cl. The difference of 

 0.092 gram per liter is within experimental error 

 when one remembers that the above calculations are 



