FOREST, FISH AXD GAME COMMISSIONER. 



159 



Dissolved Air in Water 5appl^ of the Cold Spring Harbor station in Cubic Centimeters 

 per Liter of Water, tne (ias Reduced to 0° C- and 7<?o mm. Pressure, Dr^. 



SOURCE OF 

 WATER SAMPLE. 



Tem- 

 pera- 

 ture 

 Centi- 

 grade. 



Carbon 



Di- 



oxid. 



Nitro- 

 gen. 



Oxy- 

 gen. 



Normal con- 

 tent of pure 

 water when 

 saturated with 



air at the 

 given temper- 

 ature. 



Excess + 



or 

 Deficit — . 





Nitro- Oxy- 

 gen, gen. 



Nitro- 

 gen. 



Oxy- 

 gen. 



Spring at edge of Reservoir 



pond J 9.5 



4-7 J ! 5 - 73 



6.71 



*5-5 



7.96 



+ ° - 2 3 



— T.25 



Factory pond 1 1 . 



1.6 



14.9 



6.79 



M-74 



7.69 



+ 0.16 



— 0.9 



Middle of Reservoir pond . . 13.0 



0.71 14-65 



10 . 46 



14-47 



7-35 



+ 0.18 



+ 3-H 



Same, second determination, one 



day later J 1 1 . 



i-7 



J5-63 



IO-S5 



1 5 . 06 



7.69 



+ 0-57 



+ 3.16 



South end of Reservoir pond . 1 12.0 



4.0 



15.47 



6.8 



14.80 



6 .09 



+ 0.67 



— 6 . 71 



Reservoir pond at intake for 

 hatchery \ 1 1 . 



2-3 



15-3° 



8.01 



15.06 



7.69 



+ 0. 24 



+ 0. 16 



First fry pond ir.5 1.2 14.83 



7-74 



14-Q0 



7-55 



. 07 



+ . 14 



Second row of fry ponds . . "-5 IJ 1 M-77 



7.88 | 14.00 



7-55 



—0.13 



-I-0.28 



Inflow at south end of fry pond . 10.5 \ 2.6 1504 



7.01 I 15.20 



i 



7.78 



. 16 



—0.77 



- pond for adults . . . 1 2 . 5 1 1.5 14.51 



7.29 | 14.62 



7-43 



— . 1 1 



— . 14 



Jones artesian well . . . . 1 1 . 



3.6 17.12 



1 



6.6 



15.06 



7.69 



+ 2 . 06 



— 1 . 09 



As for oxygen, which is that portion of the atmosphere which after 

 solution in the water plays an essential part in the life process of fishes,. the 

 Cold Spring Harbor water is in no case lacking an abundant supply. It is 

 not in every case quite saturated with oxygen, that is, does not contain 

 all that is capable of holding at the temperature existing and at atmospheric 

 pressure; but the deficiency is slight. In the middle of the " reservoir pond," 

 however, which is practically a large spring, its condition is rather remarkable 

 and unusual for natural waters. Is is supersaturated with oxygen, the excess 

 being more than three cubic centimeters per liter of water, and consequently 

 oxygen must be passing from the water into the atmosphere. The source of 



