. Elementary chemical microscopy . FlG. 79. Reagent Bottle with Barnes Pipette. (X§.) Fig. 80. Ebonite Tubes for Ammonium Fluoride. and filled with fresh material, owing to the extraction of soluble constituents from the glass walls of the containers. Ammonium fluoride and other fluorine compounds are placed in small stoppered tubes made of hard rubber, Fig. 80, or in cerosine-lined vials. In the latter case frequent renewing of the reagent is essential. Glass Rods and Pipettes. — The tiny amounts of reagents required for microchemical tests are most conveniently removed from bottles and vials
. Elementary chemical microscopy . FlG. 79. Reagent Bottle with Barnes Pipette. (X§.) Fig. 80. Ebonite Tubes for Ammonium Fluoride. and filled with fresh material, owing to the extraction of soluble constituents from the glass walls of the containers. Ammonium fluoride and other fluorine compounds are placed in small stoppered tubes made of hard rubber, Fig. 80, or in cerosine-lined vials. In the latter case frequent renewing of the reagent is essential. Glass Rods and Pipettes. — The tiny amounts of reagents required for microchemical tests are most conveniently removed from bottles and vials by means of drawn-out glass rods or by platinum wires mounted in a glass handle. The type of glass rod found to be most useful is shown in Fig. 81; if one or two
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectmicroscopy, bookyear1
