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AIR-GERMS AND SPONTANEOUS GENERATION.
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water, which had been kept for two or three months in a heated stove, without any development of organisms, to an apparatus arranged like that in Fig. 3.
Fig. 3.—M. Pasteur's Apparatus For the Introduction of Calcined Air into Flasks Containing Organic Infusion.
The pointed end of the flask passed into a strong glass tube .39 to 46 inch in its inner diameter, within which he had placed a piece of tube of small diameter, open at both ends, free to slip into the larger tube, and inclosing a portion of one of the small plugs of cotton loaded with dust. The larger glass tube is bound to a brass tube in form of a T, furnished with stopcocks, one of which communicates
