--+----------+------------+------
5" | 3/4" | 150 gal. | 12 | 1 qt. | 4 lb. | $ 90
6" | 1" | 300 gal. | 16 | 2 qt. | 4 lb. | 130
8" | 1-1/4" | 500 gal. | 20 | 2 qt. | 5 lb. | 160
10" | 1-1/2" | 1000 gal. | 50 | 3 qt. | 6 lb. | 240
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_Gas engines for pumping._

During the last few years, on account of the great demand for gas
engines for power boats and automobiles, the efficiency and reliability
of these engines depending upon the explosive power of the mixture of
gas and air has greatly increased. To-day, probably no better device for
furnishing a satisfactory source of power in small quantities at a
reasonable cost can be found. One engine might readily be used in
several capacities, pumping water during the day or at intervals during
the day when not needed for running feed cutters; and possibly running a
dynamo for electric lights at night. It would be easy to arrange the gas
engine so that a shift of a belt would transfer the power of the engine
from a dynamo to a pump or to other machinery. In this case the pump is
entirely distinct and separate from the engine, and while the gas engine
may be directly connected with the pump and bolted to the same bed
plate, if the engine is to be used for other purposes than pumping, an
intermediate and changeable belt is desirable.

The term "gas engine" is properly restricted to engines literally
consuming gas, either illuminating gas or natural gas; but the term is
also applied to engines using gasolene as a fuel. The same principle is
used in the construction of oil engines where kerosene oil is the fuel
instead of gasolene, and it is probable that the latter engines are
safer; that is, less subject to dangerous explosion than the former.
Whichever fuel is used, the engine may be had in sizes ranging from one
half to twenty horsepower and are very satisfactory to use. Any
ordinary, intelligent laborer with a little instruction can start and
operate them, and except for occasional interruptions they may be
depended upon to work regularly. The cost of operation with different
fuels may be estimated from the following table, which also shows the
cost when coal is used as in an ordinary steam plant, the data being
furnished by the Otto Gas Engine Works:--

TABLE XIII

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