per day, with a tendency to increase. Enough
water filtered through the concrete to produce settlement and cracks.
Finally, the concrete was water-proofed with two coats of soap, two of
alum, and one of asphalt. This has made all the reservoirs water-tight.
Elaterite, an asphalt paint made by the Elaterite Paint and
Manufacturing Company, of Des Moines, Iowa, was used successfully on the
Luna Reservoir. This paint is applied cold, and preliminary tests showed
it to be quite efficient.
The analysis of the soil is as follows:
Loss on ignition 3.35
Silica 56.36
Oxide of iron 2.93
Oxide of aluminum 8.97
Calcium oxide 15.95
Magnesium oxide 0.98
Oxides of sodium and potassium 0.47
Carbonic acid 11.35
Sulphuric acid 0.11
Chlorine 0.04
Manganese Traces
------
100.51
Insoluble matter, 64.50 per cent.
_Pipe-Line Leakage_.--There is no measurable leakage from the iron
pipe. By thorough inspection and measurement at the end of two years,
leakage on the wood pipe, between Coyote and Bonito Creek, from the
11-and 12-in.
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