| June 7. | June 30. | July 25.
|_____________|___________|___________|__________
|Not filtered.| | |
Total solids. | 109 | 125 | 141 | 132
Loss on ignition. | 33 | 21 | 29 | 23
Chlorine. | 32 | 44 | 42 | 43
Oxygen required | | | |
for 15 minutes. | 2.56 | 0.76 | 0.27 | 0.79
Oxygen required | | | |
for three hours. | 4.27 | 0.79 | 0.50 | 1.00
Free ammonia. | 2.20 | 0.88 | 0.50 | 0.92
Albuminoid am- | | | |
monia. | 0.32 | 0.17 | 0.092 | 0.19
_____________________|_____________|___________|___________|__________
The electrical shoot was built in brick and contained 28 cells arranged
in series.
Each cell contained 13 cast iron plates 4 in. x 2 ft. 8 in. x 1/2 in.
thick connected in parallel.
The available electrode surface in each cell was 256 sq.
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