. Bacteria : especially as they are related to the economy of nature, to industrial processes and to the public health. Bacteriology; Bacteriology. BACTERIA IN WATER 45 emulsion of the bacteria of the original water, phenol-gelatine plates or Eisner plates (both acid media) may be readily made. In this way we not only catch many bacteria which would evade us if we were content with the examination merely of a few drops of the water, but we eliminate by means of the acid those common water bacteria, like Bacillus fluorescens liquefaciens, which so greatly confuse the issue. In the course of two
. Bacteria : especially as they are related to the economy of nature, to industrial processes and to the public health. Bacteriology; Bacteriology. BACTERIA IN WATER 45 emulsion of the bacteria of the original water, phenol-gelatine plates or Eisner plates (both acid media) may be readily made. In this way we not only catch many bacteria which would evade us if we were content with the examination merely of a few drops of the water, but we eliminate by means of the acid those common water bacteria, like Bacillus fluorescens liquefaciens, which so greatly confuse the issue. In the course of two or three days the film of gelatine on the plate becomes covered with colonies of germs, and the next step is to examine these quantitatively and qualitatively. We may here insert a simple scheme by which this may be most fully and easily accomplished :— I. Naked Eye Observation of the Colonies. By this means at the very outset certain facts may be obtained, viz., the size, 0 o <L. 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 Newman, George, Sir, 1870-1948. London : John Murray
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