The principles of hygiene : a practical manual for students, physicians, and health officers / by D.H. Bergey.

David Hendricks Bergey

Date:: 1901

Credit: The principles of hygiene : a practical manual for students, physicians, and health officers / by D.H. Bergey. Source: Wellcome Collection.

Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.

440/532 page 436

$Par. 4. The bedding, fabrics, and carpets should be removed and disinfected by steam or by boiling. After thorough mechan- ical cleansing the woodwork and all other exposed surfaces shall be washed with an acid solution of bichlorid of mercury, i : 1000, or a 3 per cent, solution of pure carbolic acid. Fabrics which cannot be removed shall be thoroughly saturated with a solution of bichlorid of mercury, i : 1000, or a 3 per cent, solution of pure carbolic acid. P.A.R. 5. The water ballast of a vessel coming from a cholera- infected port should be discharged at sea, or, if discharged in fresh or brackish water, must be previously disinfected. The tanks to be flushed and refilled with sea-water or disin- fected. Par. 6. For a wooden vessel the treatment is as above, except that exposure of the hold and living apartments to sulphur dioxid, 10 per cent, volume, must precede the other treatment. This exposure must be, for the hold, forty-eight hours, and for living apartments twelve hours. Par. 7. All solid ballast, on vessels infected with, or suspected of being infected with, cholera, to be discharged or disinfected previous to disinfection of hold; all such ballast discharged in fresh water to be disinfected by saturation with, or immersion in, an acid solution of bichlorid of mercury, i : 800. Clear, hard, close-grained rock may be permitted to remain on board, but only after disinfection by immersion in an acid solution, I : 800, of bichlorid of mercury. Ballast removed from vessels infected with, or suspected of being infected with, cholera, must not be taken from the quarantine station. Par 8. Disinfection of Steerage, Forecastle, and Cabin of Ves- sels by Formaldehvd Gas.—Kiltx the removal of the■ bedding, carpets, and furnishings, all apertures being tightly closed, the steerage, forecastle, and cabin of a vessel may be disinfected by formaldehyd gas in a percentage of not less than 2 per cent, per volume strength, the time of exposure to be not less than twelve hours. The gas may be generated by one of the following methods: , • ^ 1 \,r^ (a) From a mixture containing formalin 100 parts, calcium chlorid or sodium nitrate 20 parts, and glycerin 10 parts. _ The gas is evolved from this solution by heating it in a special boiler, autoclave, or formaldehyd generator. One liter of a 40 per cent, solution of formaldehyd gas will evolve about 1425 Hters (50.1 ^^^^ic feet) of the gas at 20 (68° F.), and will be sufficient for 71 cubic meters (2505.5 cubic ^^?])°From the substance known as trioxymethylene, by means of a special lamp, not less than 2 grams (30 grams) to be used for each cubic meter (35.29 cubic feet) of space. ond fore- After the disinfection of apartments (steerage cabin and tore casVle) by formaldehyd gas, the latter may be neutralized by$