Elementary chemical microscopy (1921) Elementary chemical microscopy . elementarychemi00cham Year: 1921 OBJECT SLIDES 11'.) blow or two with a hammer, filed to a double chisel edge and polished, thus giving an instrument useful in breaking up small fragments of soft salts, or in loosening reagents in the set of vials referred to above. Fig. 83. Forceps for Microscopic Work. (Full size.) Forceps. — For picking up tiny fragments of dry material, handling cover glasses, small watch glasses, etc., forceps (Fig. 83) with fine curved tips are indispensable. The corrugations usually found on the
Elementary chemical microscopy (1921) Elementary chemical microscopy . elementarychemi00cham Year: 1921 OBJECT SLIDES 11'.) blow or two with a hammer, filed to a double chisel edge and polished, thus giving an instrument useful in breaking up small fragments of soft salts, or in loosening reagents in the set of vials referred to above. Fig. 83. Forceps for Microscopic Work. (Full size.) Forceps. — For picking up tiny fragments of dry material, handling cover glasses, small watch glasses, etc., forceps (Fig. 83) with fine curved tips are indispensable. The corrugations usually found on the points should be carefully filed away until the tips are almost smooth. When deliquescent or corrosive materials are to be handled the forceps should be provided with solid platinum tips, Fig. 84. No microchemical outfit can be considered as complete without platinum tipped forceps. Just as in the case above cited the roughening at the tips should be carefully removed and at least Fig. 84. Forceps with Platinum Tips. (Full size.) one of the tips also filed flat and smooth on the outside, thus al- lowing the tip to be used as a tiny spatula. Tips should be sufficiently stiff and rigid to permit holding fragments firmly to obviate all danger of dropping material or bending the tips. Foil-like tips are for this reason an abomination since the slightest excess of pressure causes them to bend and loosen. Object Slides and Other Supports. -- Object slides or slips employed in microchemical analysis should be from 1 to millimeters thick and made from glass of such composition as to be as resistant as possible to the action of solvents. The color- less glass object slides in common use in America, so excellent for ordinary microscopic work, are easily attacked by all the usual solvents and reagents employed in qualitative analysis.
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