Bugs in Railway Carriages
نویسنده
چکیده
Sir,?With reference to Major Cornwall's letter in the February number of the Indian Medical Gazette, I would state that Hydrocyanic Gas has been used for some years to cleanse from bugs the sleeping carriages on the Cape Government Railways. Reference to this will be found in the report of the Government Entomologist of the Cape of Good Hope for the year 1901. The results were satisfactory and no accident had occurred in the three years of use prior to that date. One ounce of Potassium Cyanide to 155 cubic feet air space with an exposure of one hour killed 12 out of 15 bugs, the remaining three being very feeble. Eggs of the bugs failed to hatch in three tests after exposure of one hour to gas of the above strength. The Government Entomologist advises the use of 1 oz to 100 cnbic feet and exposure for two hours. The gas I have found has considerable penetrating powers. It does not injure the woodwork, or cloth stutf. By means of suitable tests which can easily be performed, the presence of this gas can be detected in minute quantities so that the carriages can be pronounced free from gas before use is permitted. If an air-tight shed be built and an intelligent worker be entrusted with the performance of disinfection, the cost of the chemicals would be trivial,?6 or 7 annas per 1,000 cubic feet.
منابع مشابه
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عنوان ژورنال:
دوره 46 شماره
صفحات -
تاریخ انتشار 2016