. The principles of bacteriology; a practical manual for students and physicians. Bacteriology. THE INCUBATOR 151 regulator. This apparatus has for its object the maintenance of a constant pressure of the gas going to the thermo-regu- lator. There are several forms of regulator in use, but they do not accomplish the object for which they are designed. The instrument most commonly employed, the apparatus of Moitessier (Fig. 31), is based on somewhat the same principles as the large regulators seen at the manufactories of illuminating-gas. Such apparatus act very well when Fig. 31. Moitessier's
. The principles of bacteriology; a practical manual for students and physicians. Bacteriology. THE INCUBATOR 151 regulator. This apparatus has for its object the maintenance of a constant pressure of the gas going to the thermo-regu- lator. There are several forms of regulator in use, but they do not accomplish the object for which they are designed. The instrument most commonly employed, the apparatus of Moitessier (Fig. 31), is based on somewhat the same principles as the large regulators seen at the manufactories of illuminating-gas. Such apparatus act very well when Fig. 31. Moitessier's gas-pressure regulator. employed on the large scale, as one sees them at the gas- works; but when applied to the limited and sudden fluctua- tions seen in the gas coming from an ordinary gas-cock are practically useless. They are too gross in their con- struction, and act only under comparatively great and gradual fluctuations in pressure. If a good form of thermo- regulator be employed, there is no necessity for the use of any of the pressure-regulators thus far 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 Abbott, Alexander Crever, 1860-1935. Philadelphia, Lea & Febiger
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