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Show Sunshine As A Germicide Tests Show That Germs of Disease Cannot Survive When Exposed to the Sun Sunshlno 1b an amazingly potent germicide for the farm housekeeper and In the dairy and stables. The practlco of exposing cooking and oth- I or utensils used In connection with food to direct sunlight makes use of this fact, although comparatively fow appreciate exactly the work done by the sun in this regard.. Probably only those who are acquainted with tests which have actually been made to realize how quickly sunshine kjlls I disease germs exposed to It. Hence the following tests may be generally instructive and interesting. A pasty, creamy masi of tuberculous tubercu-lous material which was proved to contain uncountable numbers of virulent viru-lent tuberclo bacilli, was obtained from a tuberculous cow and spread In thin smooth translucent layers on sheets of glass, pieces of wood, and strips ot muslin. Some of tho sheets of glass, pieces of wood, and strips of muslin were then placed, outdoors on a moderately warm, c'.ear, calm day whero the sun could shlno on them, and an equal number were placed in a dark room. After 15 minutes exposure to tho sun, tho tuberculosis material on the glass, wood, and mulln still contained contain-ed largo numbers of living, virulent tuberclo bacilli, which wero proved to be fully capable ot causing tuberculosis, tuber-culosis, but after 30 minutes exposure expos-ure to the sun no living tuborcle bacilli ba-cilli could be found; In every test that could be mado proved that they wero alii dead. Similar tests with quite large opaque opa-que masses of tuberculosis material, larger and denser than any tuberculous tubercu-lous person Is apt to expectorate, proved that the bacilli In such masses mass-es on g'ass are still alive after 4 but entirely dead In less than 8 hours, and still alive In tho material on wood and muslin after 8, but dead in less than 16 hours. Tho tuberculosis material' In thin layers on glass, wocd, and mulln, kept in a dark room, was proved to contain fully virulent, living tuborcle bacilli after 30 days. Tho contrast Is remarkable, tuberclo bacilli ot tho snmo kind, on the same kind of material, ma-terial, dying In a smaller number of minutes In tho sunshine than tho number of days thoy remained alive In a dark doom. As most varieties ot dlscaso germs nro moro easily destroyed by germicides germi-cides than tubcrc'o bacilli, and as tuberclo bacilli in tho thin layers in which thoy aro likely to adhere to clothing, blankets, rugs, draperies, furnlturo, wnlls, floors, etc., are killed kill-ed by tho rays of the sun In less than half an hour though they romaln allvo in dark places a month and longer it Is reasonable to draw tho fol'owlng conclusions: taj. as a general sanitary principle princi-ple It is desirable that all dwellings, stnblcs, etc., should bo so constructed construct-ed that an abundance ot sunshlno can reach their Interiors, (b). As a general protective measure mea-sure against disease germs, It Is an oxccllcnt practice to expose utensils for handling milk and milk cans af-tor af-tor they havo been cleaned to dlroct sunlight and to hang or spread wearing wear-ing apparel, blankots, bedding, rags, horse blankets, etc., periodically whore tho sun can shine on all parts of thom. Utah Farmer. |
