ECKEL.] 
SALT    INDUSTRY    IN    UTAH    AND    CALIFORNIA. 
489 
the  lake  gradually  became  fresher,  reaching  its  recorded  least  concen- 
tration in  1873.  A  reverse  process  then  set  in,  and  the  lake  has  now 
almost  reached  the  concentration  point  of  1850. 
Specific  gravity  and  solid  contents  of  water  of  Great  Salt  Lake/1 
Date  of  collection. 
1850 
1869.  Summer.. 
1873.  August  . . . 
1885.  December. 
1888.  February  . 
1889.  June 
1889.  August  . . . 
1892.  August  . . . 
1892.  September 
1893 
1894.  December. 
1895.  May 
1900.  June 
Specific 
gravity. 
1.170 
1.111 
1.102 
1.  2225 
1. 1261 
1.148 
1. 1569 
1.156 
1. 1679 
1. 1538 
1. 1583 
1. 1576 
Solids. 
Per  cent. 
22.  282 
14. 9934 
13.42 
16.  7162 
19. 5576 
20.51 
21.47 
20.05 
21.16 
21.39 
20.90 
Authority. 
L.  D.  Gale. 
O.  D.  Allen. 
H.  Bassett. 
J.  E.  Talmage. 
Do. 
Do. 
Do. 
E.  Waller. 
J.  E.  Talmage. 
J.  T.  Kingsbury. 
J.  E.  Talmage. 
Do. 
H.  McCoy  and  T.Hadley. 
"This  table  is  reprinted  from  the  valuable  booklet  on 
published  in  Salt  Lake  City,  1900. 
The  Great  Salt  Lake,"  by  Dr.  J.  E.  Talmage, 
Chemical  composition  of  Great  Salt  Lake  water. — The  composition 
of  the  water  of  Great  Salt  Lake  is  subject  to  seasonal  and  other  varia- 
tions, but  the  following  live  analyses  will  serve  to  show  its  range.  It 
is  a  naturally  highly  concentrated  brine,  and  therefore  carries  practi- 
cally no  gypsum  or  carbonates,  as  these  have  already  been  precipitated 
along  the  shores  and  at  the  bottom  of  the  lake. 
Analyses  of  water  of  Great  Salt  Lake. 
Sodium  chloride  (NaCl) 
Potassium  chloride  (KC1)  ... 
Magnesium  chloride  (MgCl2) 
Sodium  sulphate  (Na.2S04)  ... 
Potassium  sulphate  (K2S04)  . 
Calcium  sulphate  (CaS04)  ... 
Analyst. 
L.  D.  Gale.  O.  D.  Allen.  H. Bassett.       J.  E.  Talmage 
20.20 
.25 
1.83 
Total  solid  contents 
Specific  gravity  . . . 
22.42 
1.170 
Date  of  collection j     1850 
11. 
1.49 
.93 
.53 
.09 
14.82 
1.111 
1869 
8.85 
1.89 
1.19 
1.09 
.20 
13.67 
1.102 
1873 
13.59 
1.13 
1.42 
.43 
.15 
16.72 
1.122 
1885 
15.74 
2.01 
1.05 
.47 
.28 
19.55 
1.157 
1889 
