. Laboratory work in bacteriology. Bacteriology. 160 BACTERIOLOGY. dicated is of the author's own construction (see Fig. 37). As a rule, a regulator is not necessary when using the dry-heat Fig. 25. Dry-heat sterilizer, double width. In the corners, perforated brass tubes to protect the thermometer and the thermoregulator. The time necessary to effect sterilization in the dry- heat oven will, of course, depend upon the temperature. The ordinary laboratory articles are quickly sterilized at 150°. When the thermometer indicates 150°, the time should be noted, and this temperature sh
. Laboratory work in bacteriology. Bacteriology. 160 BACTERIOLOGY. dicated is of the author's own construction (see Fig. 37). As a rule, a regulator is not necessary when using the dry-heat Fig. 25. Dry-heat sterilizer, double width. In the corners, perforated brass tubes to protect the thermometer and the thermoregulator. The time necessary to effect sterilization in the dry- heat oven will, of course, depend upon the temperature. The ordinary laboratory articles are quickly sterilized at 150°. When the thermometer indicates 150°, the time should be noted, and this temperature should then be main- tained for % to % oi an hour. Glass tubes and dishes are, therefore, to be sterilized in the dry-heat oven at a temperature of 150-160° for >^-^ of an hour. A tem- perature of 170°, maintained for 15 minutes, will be suffi- cient to effect sterilization. Another procedure is to allow the temperature to rise till it reaches 195°, when the light is turned out. The door of the oven remains closed until the temperature falls below 100°. The cotton plugs in the. 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 Novy, Frederick George, 1864- . Ann Arbor [Mich. ] G. Wahr
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