. The principles of hygiene; a practical manual for students, physicians, and health-officers . Fig. 30.—Hopper closet. Fig. 31.—Wash-out closet. trough closet or latrine for schools and public institu-tions. WA TER- CL OSE TS. 149 The supply of water for the wash-down closet consistsof the introduction of a separate cistern, used exclusivelyfor the water-closet, generally termed a water-waste. FlG. 32.—-Wash-down closet. preventer (Fig. 33), because only a limited supply ofwater is available for delivery. The amount of waterusually supplied in the cistern is about 15 liters. The

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Keywords: ., bookcentury1900, bookdecade1900, booksubjecthygiene, bookyear1901