. Preventive medicine and hygiene. in the box E for protection, andthis is placed in the chamber or in the inside of bundles to be disin-fected. The insulated wires from F and G are connected with a batteryand bell. As soon as the temperature reaches 100° C. the little metalstick melts, the contact is made between B and C, and the bell form of thermometer is more accurate than the pyrometers, whichdepend upon the contact being made by the unequal expansion of a com-pound metal bar, for the reason that moisture collects upon the electrodesand an electric contact is sometimes made bef
. Preventive medicine and hygiene. in the box E for protection, andthis is placed in the chamber or in the inside of bundles to be disin-fected. The insulated wires from F and G are connected with a batteryand bell. As soon as the temperature reaches 100° C. the little metalstick melts, the contact is made between B and C, and the bell form of thermometer is more accurate than the pyrometers, whichdepend upon the contact being made by the unequal expansion of a com-pound metal bar, for the reason that moisture collects upon the electrodesand an electric contact is sometimes made before the metal parts actuallytouch, thereby giving false readings. Steam chambers must always be provided with galvanized or copperhoods to prevent rust-stained drip from soiling the clothing and otheobjects exposed to the steam; gages to indicate both vacuum and steai^ipressure, and a safety valve to prevent over-pressure in the amount of pressure from the boiler is regulated by a reducing valvein the main steam 1130 PHYSICAL AGEXTS OF DISIXFECTION For convenience in handling the goods cars are provided, of lightwronght-iron construction, with movable tra3^s made of galvanizedscreens; also bronze hooks at the top of the car, permitting the articles to be laid npon the trays orto be hnng np on the hooks. In the accompanying dia-gram (Fig. 162) the methodof installing the steam cham-bers in the disinfecting shedof a quarantine station isshown. It will be noted thatthe cylinders open on bothends, and that a dividingwall running across thebuilding separates the receiv-ing end, where the infectedobjects arrive and are pre-pared for disinfection, fromthe discharging end, wherethe contents of the chamberare aired, dried, and re-packed after disinfection. This separation is essen-tial where a large amount ofdisinfection is done for avariety of diseases, as, forexample, in a municipal dis-infecting establishment or atthe quarantine station of abusy port. It is true t
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Keywords: ., bookauthorwh, bookcentury1900, bookdecade1910, booksubjecthygiene
