Mechanics of the household; a course of study devoted to domestic machinery and household mechanical appliances (1918)
Keene, E. S. (Edward Spencer), b. 1864 · New York, McGraw-Hill book company, inc.; · leaf 25
Fig. 8.—A separate return heating plant. Overhead or Drop System.—There is yet another gravitysystem of steam heating that is sometimes used in large buildingswhere economy in the use of pipe is desired; this is the overheador drop system shown in Fig. 9. It is not a common method ofpiping and is…
Heating · Lighting · Plumbing
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