The use of a steam pump would probably not be considered for a single house unless a small boiler was already installed for other purposes. Not infrequently a boiler is found in connection with a dairy for the purpose of furnishing steam and hot water for washing and sterilizing bottles and cans. Where silage is stored in quantity, a steam boiler and engine are often employed for the heavy work of cutting up fodder. In both these cases it may be a simple matter to connect a small duplex pump with the installed boiler, as is done frequently in creameries, for the sake of pumping the necessary water-supply for the house. Whenever extensive improvements are contemplated, it is well worth while to consider the possibilities of one boiler operating the different kinds of machinery referred to. In Fig. 48 is shown a small pump, made by The Goulds Manufacturing Co., capable of lifting forty-eight gallons of water per minute against a head of a hundred feet. The diameter of piston is four inches and the length of stroke is six inches. It is operated by a belt from a steam engine used for other purposes as well. [Illustration: FIG. 48.--Pump operated by belt.] [Illustration: FIG. 49.--Duplex pump, operated directly by steam.] TABLE XIV ==========+==========+========+=============+=============+=========+ Diameter | Diameter | Length | | | Gallons of Steam | of Water | of | Gallons per | Revolutions | per Cylinders | Pistons | Stroke | Revolution | per Minute | Minute ----------+----------+--------+-------------+-------------+---------+ 3 | 3/4 | 3 | 0.019 | 80 | 1.5 3 | 1 | 3 | 0.033 | 80 | 2.6 4-1/2 | 1 | 4 | 0.044 | 75 | 3.6 | | | | | 4-1/2 | 1-1/4 | 4 | 0.064 | 75 | 4.8 5-1/4 | 1-1/4 | 5 | 0.08 | 70 | 5.6 5-1/4 | 1-3/4 | 5 | 0.18 | 70 | 12.7 | | | | | 6 | 1-3/4 | 6 | 0.22 | 65 | 14.0 6 | 2 | 6 | 0.29 | 65 | 19.0 6 | 2-1/4 | 6 | 0.38 | 65 | 25.0 | | | | | 7-1/2 | 2-1/2 | 6 | 0.38 | 65 | 25.0 6 | 2-1/2 | 6 | 0.48 | 65 | 31.0 7-1/2 | 2-1/2 | 6 | 0.048 | 65 | 31.0 | | | | | 7-1/2 | 2-3/4 | 6 | 0.056 | 65 | 36.0 9 | 2-3/4 | 6 | 0.056 | 65 | 36.0 9 | 3-1/2 | 6 | 0.079 | 65 | 51.0 ==========+==========+========+=============+=============+=========+