Further experiments on the distribution of micro-organisms in air (by Hesse's method)

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Abstract
In a previous communication entitled “The Distribution of Micro­organisms in Air" a number of experiments have been recorded by one of us on the relative abundance of microbes in the air of various places and of the same place at different times. The numerical determination of the aërial micro-organisms in these experiments was made by means of Hesse’s apparatus, the method of using which was there fully described.