also during a few summer double that amount if used alone for cooling purposes. piping. The former plan was preferred, and two new months in the Northern States. These changes consist No motive power is shown, as it is customary to locate wells were sunk to no purpose. The services of a gen- in… … Fig. 2.-C0MBINED QRAIN DRIER AND COOLER. (the continued friction and attrition which the results obtained by actually with the metal surface scouring off sinking wells amply justified, the quan- the dust, which is removed by the current of air), ready tity of water to be obtained being apparently…
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