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. × 2 ft. 8 in. × ½ in.
thick connected in parallel.

The available electrode surface in each cell was 256 sq. ft.

The ampere hour treatment required for Salford was found to be about
0.37 ampere hours per gallon, and the I.H.P. per million gallons based
on these figures would be 37.

NOTE.--In estimating for the plant necessary for treating the whole of
the Salford sewage, a margin was allowed on above figures. The A.H.T.
was taken at 0.4 and the I.H.P. per million at 39 to 39.5.

Mr. Octavius March, electrical engineer, who has followed the process
from the commencement, and who superintended the electrical details both