A manual of hygiene and sanitation . he food-supplyof the bacteria, if not the substance of the latter them-selves, is partly of this nature. For the same reason ithardens and disagreeably roughens the skin, which tendto prevent its use for topical applications to the humanbody. Several methods have been devised for the productionor liberation of formaldehyde in rooms and buildingsin such volume as positively to secure both surface and 334 DISINFECTION. penetrative disinfection. One of the first devised andbest methods involves the heating and vaporizing of asolution of the gas, such as formal
A manual of hygiene and sanitation . he food-supplyof the bacteria, if not the substance of the latter them-selves, is partly of this nature. For the same reason ithardens and disagreeably roughens the skin, which tendto prevent its use for topical applications to the humanbody. Several methods have been devised for the productionor liberation of formaldehyde in rooms and buildingsin such volume as positively to secure both surface and 334 DISINFECTION. penetrative disinfection. One of the first devised andbest methods involves the heating and vaporizing of asolution of the gas, such as formalin or formochloral, thelatter a mixture of the former with calcium instance, in Trillats apparatus the latter solution isused, the calcium chloride being added to insure furtheragainst the precipitation of paraform. A simpler device,called a regenerator, allows the formalin to flow in a finestream through a copper coil heated to redness by a flamebeneath, the gas and vapor then passing directly into the Fig. 54. Rg.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecthygiene, bookyear1903
