eokel] SALT AND GYPSUM OF SOUTHWESTERN VIRGINIA. 
415 
Geologic horizons from ivliich salt is obtained. 
Upper Silurian New York." Michigan, Ohio/' Ontario (Canada) . 
Carboniferous Pennsylvania, West Virginia, Virginia, Kentucky. 
Michigan. 
Permian, Triassic Kansas," Oklahoma, Texas. 
Cretaceous, Tertiary Louisiana/' Texas. 
Recent — sea and lake waters .-Texas, Utah, Nevada, California. 
Analyses of rock salts from various localities. 
Locality. 
Sodium chlo- 
ride. 
3 
V 
II 
o H 
O 
•a 
.^■72 
go 
3 
t» . 
.3 -a 
"oS 
O 
a 
a a 
tf to 
'55 g 
.2 a 
a* 
S3 
Authority. 
Saltville, Va 
99.084 
93.05 
98. 701 
96.885 
•98. 28 
97.031 
99.687 
91. 24 
99. 53 
98.90 
98. 731 
99.097 
Tr. 
0.446 
2.40 
.484 
.437 
.560 
1.4:51 
.090 
2.81 
.214 
.838 
1.1112 
.729 
.46 
.65 
2.05 
2. : 5 
3.50 
0. 07 
0.470 
3.64 
. 743 
1.21 
.8&5 
0.30 
Tr. 
1.21 
.206 
1.500 
.079 
.K39 
.080 
.030 
.039 
C. B. Hayden. 
Radcliffe. 
Do/'. 
Retsof,N.Y 
0.018 
.157 
.031 
.007 
. 032 
.57 
.109 
.146 
Tr. 
0.055 
. 103 
. 088 
.031 
.095 
. 05 
Tr. 
0.022 
.013 
F.E.Englehardt. 
Do. 
Do. 
Pearl Creek, N.Y 
Greigsville, N.Y 
Do... 
Do. 
Do 
.158 
.017 
5. 33 
. 007 
.014 
.034 
T.S.Hunt. 
Do. 
F. E. Englehardt. 
P. Collier. 
Do 
Do 
P. W. Taylor. 
Cheshire, England _ 
Do 
99.52 
98.32 
97.70 
97.45 
96.28 
0.01 
.02 
.02 
G.H.Cook. 
.15 
1.00 
.10 
.20 
.14 
G-. H. Cook. 
...Do 
Do. 
Carrickfergus, Ireland.. 
.08 
Do. 
Analyses of solid matter of brinet 
• from various localities. 
Locality. 
6 
3 
a^ 

GO 
3 

Is 
O 
a 
2© 
"5:2 
£ 
^3 
1° 
3 
02 . 
a-s 
a 
.2-2 
to o3 
a p< 
£ to 
-J 
.2 a 
a * 
3^ 
£3 
£1 
Specific grav- 
ity of brine. 
Authority. 
Saltville, Va. 
Do. 
97. 792 
98.139 
97. 48 
97.60 
96.17 
95. 866 
95.312 
95.328 
99.01 
97.58 
81.38 
91.95 
82.14 
82.24 
79.45 
81.27 
98.07 
97.92 
94.87 
0.033 
2.17 
1.22 
1.68 
1.68 
1.25 
2.54 
3.03 
2.30 
.72 
2.19 
.53 
2.39 
.46 
.30 
0.39 
Tr. 
24.6 
26.4 
25.65 
26. 34 
24.52 
18.5 
16.1 
16. 1 
26. 15 
24.74 
22.02 
16.61 
21.32 
24.15 
9.2 
2.8 
26.2 
25.1 
15.2 
1.198 
1.192 
1.204 
1.192 
1.142 
1.122 
1.122 
1.205 
1. 195 
1.179 
1.073 
1.019 
1.20 
1.19 
1.122 
C. B. Hayden. 
G.H.Cook. 
Pearl Creek, N.Y .. 
.26 
.51 
2.15 
.90 
.93 
1.52 
.15 
.08 
.73 
3.19 
12.39 
12.25 
16.48 
13.93 
.13 
.15 
0.55 
.20 
.42 
.72 
.85 
.10 
.12 
6.91 
2.48 
5.01 
5.22 
4.07 
4.80 
.23 
.27 
F.E.Englehardt. 
Warsaw, N.Y 
Leroy,N. Y 
Syracuse, N.Y 
Do 

Do. 
Do. 
0.004 
.008 
.002 
G.H.Cook. 
Do. 
Do 
Do. 
Goderich, Ontario 
T.S.Hunt. 
Do.. 
C. A. Goessniann. 
East Saginaw, Mich . 
Bay City, Mich 
.48 
Douglass. 
C. A. Goessmann. 
Saginaw , Mich 
Do. 
Bay County, Mich . . . 
Kanawha, W. Va . 

Do. 
G. H. Cook. 
Pittsburg, Pa . 
Do. 
Cheshire, England. . _ 
Do 
1.57 
1.66 
1.83 


Do. 
Do. 
Dieuze, France 
3.30 
Do. 
a Utilize both brine and rock salt, b A specimen evidently much below the average in purity. 
