. Laboratory work in bacteriology. Bacteriology. THE INCUBATOB AND ACCESSOEIBS. 251 inches in diameter. By means of the gas-pressure and tem- perature regulators, which have been described, it is pos- sible to maintain a constant warmth even if the incubator is placed in a room where the ambient temperature is liable to considerable variation. Micro-burners.âThe outflow tube of the thermo- regulator should be connected with a suitable burner placed underneath the incubator. An ordinary Bunsen burner may be used in some instances, but, as a rule, it gives off too much heat, and, moreover, the f
. Laboratory work in bacteriology. Bacteriology. THE INCUBATOB AND ACCESSOEIBS. 251 inches in diameter. By means of the gas-pressure and tem- perature regulators, which have been described, it is pos- sible to maintain a constant warmth even if the incubator is placed in a room where the ambient temperature is liable to considerable variation. Micro-burners.âThe outflow tube of the thermo- regulator should be connected with a suitable burner placed underneath the incubator. An ordinary Bunsen burner may be used in some instances, but, as a rule, it gives off too much heat, and, moreover, the flame is' liable to "shoot back" when the supply of gas is low. A very good micro-burner can be obtained by un- screwing the tube of the Bunsen burner. The gas now burns with a luminous flame, but this does not in- terfere with its usefulness. A cyl- inder of copper wire-gauze may be placed around the flame to prevent currents of air from extinguishing it. The small narrow Bunsen burner, so-called microburner, can be used to , , . T , ,, J, T Fig. 39. Koch's safety burner, better, advantage than the ordinary aâMetal spiral, one on each side â T. . T . of flame; dâArm moved by the form. Small iet, luminous micro- spirals; «âWeighted lever arm of stop-cock, supported by ^. burners can also be used, but they possess no advantage over that obtained in the manner described above. The lamp usually employed under an incubator is known as the safety burner. This is intended to shut off the flow of gas, if for any reason the light should go out. The gas is thus prevented from escaping into the room, and danger of subsequent explosion is thus avoided. Several forms of the safety burner have been devised, but the one which is used perhaps the most often is that of Koch. Obviously, the safest procedure is to place the incubator, or. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and ap
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