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

general outline and description. 3 from the oil or grease will come over with the steam. But, on the other hand, although the vapours alluded to coming over with the steam may be objectionable to the taste, the process of evaporation may have the effect of destroying all poisonous matter. Filtration. 5. Filtration, although capable of separating substances iat may be mechanically suspended in water, is not effi- cient in removing any saline matter dissolved therein, and although the saline matter can be removed by chemical agency, distillation is the only really practical manner in U uch pure water or fresh water can be procured from sea water. ° Boilers.n usually applied to an t or “Evaporators” and I he term '‘Evaporator” is ___ apparatus where the heat used for generating steam cr WL°Ur fr°m the Sea Water is derived from steam heat. Where such heat is otherwise supplied—say by the com- ustion of coal, or wood, or oil, or any kind of fire., the erm Boiler ” is generally applied. In the Board of rade Rules evaporators are practically subject to the same rules in the details of construction as boilers. Use of Distilling Machinery. 7. Sea-water distilling machinery is largely used, not only at sea on steam ships, but also on land, the apparatus eing placed either on shore, so as to deal with the ad- jacent sea water, or it is placed more inland, the purpose >eing to deal with water whose impurities are such as to len er it objectionable for the purposes it is required for.