Records of the Geological Surrey of hull a. 
[voL. xiir. 
aoo 
“ The specific gravity of a saturated solution of salt is 1-2046, but on tlie 9tb 
Marcli the specific gravity of the bigbly concentrated lake brine was 1-22, and on 
the 30tb March 1-245. In this state the chemical solution is so dense that pre¬ 
cipitation in the form of truncated pyramid-shaped crystals (the well-known form 
of the Siimbhar salt) is constantly occurring, until a layer of salt about 2 inches 
in thickness overlies the mud of the lake.” 
Dr. H. Warth gives the following analyses of the lake brine (?. c., 1871-72, 
p. 155) 
“ The samples examined were as follows :— 
1. Lake brine— 
A. —Common brine from the lake, 10th December, 100 yards from the 
shore near Japog. 
B. —The same brine artificially saturated. 
C. —Brine from Japog, 24th January. 
2. SubteT'ranean brine, or percolation brine, taken from diggings in the lake 
bed at places wbei’o the surface water had receded— 
A. —Brine from reservoir in walled enclosure Ko. 2, 10th December. 
B. —Brine from the same, on 13th January. 
C. —Brine from a hole made on the shore near Japog, 10th December. 
3. Mother-liquor—Residue brine from the manufacture of salt in kyaris — 
A. —Mother-liquor from walled enclosure, No. 2, December 1869. 
B. —Mother-liquor from the same, 17th January 1870. 
0.—Mother-liquor from -walled enclosure No. 1, 26th January 1870. 
Analyses. 
Lake Brine. 
Subterranean Brine. 
Mother-Liquor. 
A. 
B. 
C. 
A. 
B. 
C. 
A. 
B. 
C. 
Dry residuum 
2T9 
27-1 
27-8 
22-7 
20-8 
20-1 
30-6 
30-4 
30-4 
Water 
78-0 
72-6 
72-2 
77-5 
79-3 
80-0 
68-8 
68-8 
68-4 
Oliloride of sodium 
19-9 
24-6 
24-8 
19-7 
17-5 
17-3 
19-1 
20-5 
19-4 
Sulphate of soda 
1-6 
2-0 
2-6 
2-5 
2-5 
2-5 
7-1 
9-4 
6-5 
Carbonate of Soda 
0-4 
0-5 
0-4 
0-5 
0-8 
0-3 
4-4 
0-5 
4-5 
Total 
99-9 
99-7 
1000 
100-2 
100-1 
100-1 
99-4 
99-2 
98-8 
Percentage of foreign salt in 
dry rcsidimiu 
9-1 
9-2 
10-8 
13-2 
15-9 
13-9 
37-6 
32-6 
36*2 
Average 
97 
14-3 
35-5 
