A short time ago we called attention1 to some of the defects in the railroad car from a hygienic standpoint. G. A. Soper2 has recently discussed the sanitary condition of street cars in New York, and what he says could be equally well applied to many larger cities in this country. The injury to health from overcrowded, poorly-ventilated quarters is well established. In such crowded apartments the effect of the foul atmosphere, which has not inaptly been called "sewer-air," is to lower the general resistance of the individual, making him more susceptible to the infectious agents which are most readily disseminated when persons come in close contact. Insufficient heat is also pointed out by Soper as injurious, both in itself and by leading to a shutting out of the outside air in order to keep warm. The matting in street cars contains an enormous number of bacteria. Sputum
SANITARY CONDITIONS OF STREET CARS. JAMA. 1902;XXXVIII(22):1449. doi:10.1001/jama.1902.02480220035019
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