A Practical Manual On Sea Water Distillation
With A Description Of The Necessary Machinery For The Process

TYPES OF DISTILLING APPARATUS. 9 to be distributed about the ship as may be desired. Again, for the same reason, the brine, instead of having to be diluted and cooled and then pumped out to sea, may be allowed to gravitate away from the apparatus (as it leaves the evaporator) out to sea without any necessity of cooling, or diluting, or pumping. 7. On liners the circulating pump is often dispensed with, as the sanitary pump on board is used to supply the circulation water, so that the distilling apparatus thus reverts to its main elements—viz., the evaporator and distilling condenser—with its filter (if water of the best quality for drinking is required). The Board of Trade Rules provide for this. On H.M. Ships. 8. On H.M. Ships it would not be expedient to place the distilling apparatus on an upper deck, where such important machinery might be shot away in action. It is. therefore, invariably fixed, not only in the engine room, but also in the protected part of the ship, hence the necessity of the various auxiliary parts above re- ferred to, including also such accessories as feed-water regulators and heaters, to obtain as far as possible auto- matic working, and economy of fuel. Duplicate Sets. 9. To the above, it may be added that on H.M. ships it is usual to have duplicate sets of distilling machinery, working on the lines above referred to. These sets are made, not only of the same power, but in duplicate, so that any part of one set may be correspondingly used in the other set. For convenience these two sets are placed