Bacteriological study of air dust in the estate of the Kazan military hospital and in its buildings

It has long been known that Russian cities are not clean. According to the research of Professor Jacob, in Kharkov, in the autumn time, as much dust is deposited from the air during 24 hours as in Paris during the whole year. The uncleanness of our cities depends on poor supervision over the cleaning of sewage from the streets, from poor paving and from insufficient watering them in summer in dry weather. There are a lot of cities in our country that are not paved at all and watering of the streets is not done everywhere. Kazan is one of the largest and best cities in Russia, although it is paved, according to the primitive method, with limestone, but in summer the streets in it are not watered, except for the main one, Voskresenskaya; and the last street is only occasionally and little by little watered.