. Bacteria, yeasts and molds in the home. Bacteriology; Yeast fungi; Molds (Fungi). DISTRIBUTION OF BACTERIA 135 arise from clothes and skin. In the air of schoolrooms or audience rooms the number of bacteria is large, and there are more at the close of a school session than at the beginning. There are more bacteria in the air of a poorly ventilated schoolroom than in the air of a sewer. The presence of animals as well as of men always increases the number of bacteria in the air. Wherever we find dust, there we find bacteria. By this it is not meant that dust is composed wholly of bacteria, fo
. Bacteria, yeasts and molds in the home. Bacteriology; Yeast fungi; Molds (Fungi). DISTRIBUTION OF BACTERIA 135 arise from clothes and skin. In the air of schoolrooms or audience rooms the number of bacteria is large, and there are more at the close of a school session than at the beginning. There are more bacteria in the air of a poorly ventilated schoolroom than in the air of a sewer. The presence of animals as well as of men always increases the number of bacteria in the air. Wherever we find dust, there we find bacteria. By this it is not meant that dust is composed wholly of bacteria, for many other things go to constitute what we know as dust; but among the dust particles we may be sure to find bacteria in great num- bers. In short, all air in the vicinity of habitation contains . r u- u Fig. 55. A group of bacteria bacteria. The air of high from water. mountains far from the habi- „ .„ tation of animals is found frodighms; c, Pseudommas jamhi- to be moderately free from nus; d, Pnteus vulgaris,-j, Mkro- . , . . coccus aquatiUs; /, Bacillus coll. these ubiquitous organisms. Elsewhere they are present in abundance. Since this is the case it is quite impossible for any material exposed to the air for even a short time to escape a rapid contami- nation with microorganisms. Water. Practically all bodies of water on the surface of the earth are filled with bacteria (Fig. 55). The number found in water, however, is widely variable. In spring water which comes fresh from the ground the number is small, and in some cases they may be wholly absent. The same thing is true of the water of artesian. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Conn, H. W. (Herbert William), b. 1859. Boston, New York, Ginn and Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbacteri, bookyear1917
