. Laboratory work in bacteriology. Bacteriology. 150 BACTERIOLOGY. The color can be forced into the specimen, thus making it stand out more sharply than would otherwise be the case, by holding the glass-slip, covered with the dye, over a low Bunsen, or alcohol flame till vapors begin to rise. The specimen is then washed as before. Instead of heating the dye on the cover-glass, it may be heated before use. For this purpose the bottle of dye is placed on an iron plate, and this is heated by a low flame. Pig. 22 shows such an iron plate, as used in the author's laboratory, slipped under the flang
. Laboratory work in bacteriology. Bacteriology. 150 BACTERIOLOGY. The color can be forced into the specimen, thus making it stand out more sharply than would otherwise be the case, by holding the glass-slip, covered with the dye, over a low Bunsen, or alcohol flame till vapors begin to rise. The specimen is then washed as before. Instead of heating the dye on the cover-glass, it may be heated before use. For this purpose the bottle of dye is placed on an iron plate, and this is heated by a low flame. Pig. 22 shows such an iron plate, as used in the author's laboratory, slipped under the flange of the ordinary water- bath. This plate is mm. thick, cm. wide, and 15 cm. Fig, 22. Water-bath with iron plate for heating dyes, cover- glassses, etc. When it is desirable to preserve a stained specimen, this should be floated off the slide by the addition of a drop, or two, of water to the edge of the cover-glass. If cedar oil has been used it should be carefully removed by rotating the cover-glass on a piece of filter paper. The preparation should then be placed, specimen side turned up, under a watch-glass until perfectly dry. Or, the drying may be. 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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