. Preventive medicine and hygiene. r disinfection. Fortunately, it isseldom necessary to disinfect such packages. When, however, this iscalled for it is essential to open and properly expose such objects to theaction of the disinfecting agent. In the municipal disinfecting stations of Paris the process of apply-ing steam under pressure is as follows: The pressure is brought up to15 pounds in the chamber and held there five minutes; then pressure is again brought up to 15 pounds, held there five minutes,and again released. This is repeated three times, when the disinfectionis compl
. Preventive medicine and hygiene. r disinfection. Fortunately, it isseldom necessary to disinfect such packages. When, however, this iscalled for it is essential to open and properly expose such objects to theaction of the disinfecting agent. In the municipal disinfecting stations of Paris the process of apply-ing steam under pressure is as follows: The pressure is brought up to15 pounds in the chamber and held there five minutes; then pressure is again brought up to 15 pounds, held there five minutes,and again released. This is repeated three times, when the disinfectionis completed. The cylinders are fitted with an ingenious arrangementfor the automatic registration of the process. Each chamber is con-nected by a small copper tube to a register with a moving pen and re-volving drum carrying a chart. The horizontal lines 1 to 10 on thechart each represent a pressure of one-tenth of an atmosphere, and thevertical lines represent five minutes in the revolution of the drum. Eachsteaming is represented thus:. Fig. 163. These charts, which can be removed only by the chief of the station,are sent each day to the Inspector-General, and give a perfect guaranteethat each steaming has been done as directed. CHAPTER IIICHEMICAL AGENTS OF DISINFECTION GASEOUS DISINFECTANTS—FUMIGATION A germicidal gas would be an ideal weapon for destroying such in-visible foes as we have to deal with in public health work, especiallyfor terminal disinfection. By reaching all portions of a room or confinedspace a gas lessens the risk of overlooking any surface upon which theinfective agent may be lodged, but the ideal gas for this purpose is stillto be discovered. There is practically only one gas suitable for general application,viz., formaldehyd. This substance comes nearer being an ideal disin-fectant than any of the gases in general use. It is not poisonous, doesnot injure fabrics, colors, metals, or objects of art and value. Formalde-hyd, however, has distinct limitations,
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Keywords: ., bookauthorwh, bookcentury1900, bookdecade1910, booksubjecthygiene
