GAS 
DISEASE IN FISHES. 
373 
TaBLe II.—Showing composition of gas in lesions of the gas disease. 
Source of sample. 
Hearts of tomcod, sculpins, and 
hake at Woods Hole. 
Body of lobster, Woods Hole... 
Fin blebs of tomcod, flat-fish 
and hake. 
Eyes of exophthalmic scup, 
Woods Hole.a 
Saecs of rainbow trout fry, White 
Sulphur Springs, W. Va. 
Percentage of— 
; 2 Size of 
1 Nittoe gas sam- Remarks. 
eee ey Oxygen. |pleinc.c. 
0 97.44 2.56 3.9 | Possibly slight contamina- 
tion with atmospheric ai 
in taking sample. 
0 94.2 5.8 3.4 Do. 
92.1 058) 7.6 
0 
0 80. 4 19.0 610 
0 92.3 Cet 2.6 | Fry preserved in formalin. 
a Analysis by Dr. M. X. Sullivan. 
b About. 
NoTe.—None of the specimens from which gas samples were taken had been dead over thirty 
hours, and most of them a much shorter time. 
There was no sign of putrefaction. 
the fish were killed. 
During this period they were in water at 10.5° C. 
The sample from the eyes of scup was taken immediately after 
TasLE IIT.—Showing nitrogen and oxygen content (in cubic centimeters per liter, reduced 
to 0°C. and 760 mm., dry) of Woods Hole sea water under various conditions. 
4 Normal con- 
S| tent of sea 
3 water when 
es saturated 
te Actual con-| with air at Excess + or 
= tent c.c. per| the given deficit — ¢.c. 
Ey liter. fomperalure per liter. 
2 = and preyail- 
Source, Date. | 3 FS ing pressure, Remarks, 
> in ¢.c. per 
H liter. 
i 
z Dittmar. 
& | Nitro-| Oxy- Nitro- | Oxy- 
5 gen. | gen. |Nitro-| Oxy- | gen. | gen. 
1a Sen | Lene 
1904. 
Harbor under| May 9) 10.0] 12.6 | 6.0 | 12.37 | 6.39 | +0.23 | —0.39 | Harmless to fishes. 
wharf. | 
No air entering the suction. 
Hatchery tap...-..- Malye (Shiels aly 2 5.9 | 12.19 | 6.29 | +0.71 | —0.39 | Harmless to fishes. 
Aquarium tap..... May 9/ 11.0] 12.7 | 5.8 | 12.16 | 6.28 | +0.54 | —0.48 | Harmless to fishes. - 
| 
With much air entering suction. 
Aquarium tap....- May 10] 9.75) 17.73 | 8.16 | 12.54 | 6.49 | +5.19 | +1.67 Rapidly fatal to 
shes, 
Aquarium tap..... May 10] 9.75) 18.23 | 8.34 | 12.55 | 6.49 | +5.68 | +1.85 Rapidly fatal to 
fishes. 
Aquarium tap....- May 10 | 10.0 | 18.79 | 8.54 | 12.48 | 6.45 | +6.31 | +2.09 | Rapidly fatal to 
fishes. 
Aquarium tap..... May 11} 10.5 | 18.01 | 8.06 | 12.37 | 6.88] +5.64 | +1.68 Rapidly fatal to 
fishes. 
Aquarium tap..... May 11 | 10.5 | 18.79 | 8.41 | 12.37 | 6.38 | +6.42 | +2.03 | Rapidly fatal to 
' | fishes. 
‘ With a lesser amount of air entering suction. 
Aquarium tap..... May 12 | 11.0 | 15.66 | 7.06 | 12.34] 6.37 | +3.32 | +0.69 | Less rapidly fatal, 
1903. 
Aquarium tap..... Sept. 18 | 20.8 | 12.5 | 4.9 | 10.28} 5.24 | +2.2 —0.34 | Transported sample. 
U. S. Bureau of 
Chemistry. 
