EXPLOKATIONS IN YELLOWSTONE NATIONAL PARK. 
45 
[The sample was taken from above the mouth of Nez Perc6 River August 24, 1884 ; temperature 8° C ; 
reaction, alkaline; specific gravity, 1.00031.] 
[ Hypothetical combination.] 
Constituents. 
Grams 
per kilo- 
griini of 
w.ater. 
Per cent, 
of total 
material 
in solu- 
tion. 
Constituents. 
Grams 
lier kilo- 
gram of 
water. 
Per cent, 
of total 
material 
in solu- 
tion. 
Naj CO 3 
0. 1201 
27. 51 
Ka 2 B 4 O 7 
0. 0087 
1. 09 
Si 62 ’ 
0. 0965 
22 . 10 
Li Cl 
0. 0067 
1 . 53 
Na Cl 
0. 0867 
19. 86 
AI 2 O 3 
0. 0059 
1. 35 
COo 
0. 0457 
10. 47 
Mg CO 3 
0 . 0024 
0. 55 
ir ("1 
0. 0325 
7. 44 
Ca OO 3 
Na2 SO4 
0.0165 
0, 0149 
5 . 78 
3. 42 
0. 4366 
100. 00 
This analysis may be comiiared with that given by the same authors for the 
Gardiner Eiver above and below the mouth of Hot Eiver, in both of whieh localities 
trout are abundant. 
[Gardiner River above Hot River, October 12, 1883; temperature 8° C.] 
[Hypothetical corahination.] 
Constituents. 
Grams 
per kilo- 
gram H 2 
^ 0. 
Percent, 
of mate- 
rial in 
solution 
(JaCOs 
0.0625 
29.25 
0 ndfiQ 
21 9.5 
0. 0340 
15. 91 
CU 2 
0. 0286 
13. 38 
Na^ SO4 
0. 0161 
7.53 
K Cl 
0 . 0103 
4. 82 
Constituents. 
Grams 
per kilo- 
gram II 2 
0. 
Percent, 
of matiO- 
rial in 
solution. 
-Al2_^3 
0 , 0079 
0. 0056 
0. 0018 
trace 
3 . 70 
2. 62 
0.84 
Mg CO 3 
Li Cl 
0.2137 
100 . 00 
[Gardiner River below Hot River, September 26, 1884; temperature, 13° C.] 
Constituents. 
Grams 
per kilo- 
gi'am H 2 
Per cent, 
of mate- 
rial in 
solution. 
Ca CO3 
0 . 1873 
0. 0852 
0. 0739 
0. 0549 
0. 0339 
0. 0272 
37. 94 
17. 26 
14. 97 
11. 12 
6. 87 
5. 51 
CO 2 - 
Mg'S04 
Na Cl 
Si Oa 
Constituents. 
Grams 
per kilo- 
gram Hz 
0. 
Per cent, 
of mate- 
rial in 
solution. 
K Cl 
0. 0200 
0. 0094 
0.0019 
trace 
4. 00 
1. 95 
0. 38 
Mg CO3 
Li Cl' 
0. 4937 
100. 00 
There are, however, numerous springs in the park which discharge sulphurous 
liquids (some of them the black ammouic sulphide (NH.i)2S, very offensive in odor 
and doubtless fatal to fishes. Most of these springs have but a very slight discharge, 
and so exert no appreciable influence on the streams. The upper part of Obsidian 
Creek between Twin Lakes and Beaver Lake is the only running stream noticed by us 
as likely to prove uninhabitable by fishes. An obstacle of equal importance in the 
lower course of the same creek is the series of three beaver-dams, to which the exist- 
ence of Beaver Lake is due ; these, with their covering of brush, must be wholly im- 
passable. 
