The microscope; an introduction to microscopic methods and to histology . g ring indicates its adherence (l 249)- 5. The cover-glass is sealed (§ 249). 6. The slide is labeled (\ 308). 7. The preparation is cataloged and safely stored (§ 309, 311). \ 247. Example of Mounting Dry, or in Air.—Prepare a shallow cell and dryit (§ 24S). Select a clean cover-glass slightly larger than the cell. Pour upon thecover a drop of \o% solution of salycilic acid in 95% alcohol. Let it dry spon-taneously. Warm the slide till the cement ring or cell is somewhat sticky, thenwarm the cover gently and put it on t
The microscope; an introduction to microscopic methods and to histology . g ring indicates its adherence (l 249)- 5. The cover-glass is sealed (§ 249). 6. The slide is labeled (\ 308). 7. The preparation is cataloged and safely stored (§ 309, 311). \ 247. Example of Mounting Dry, or in Air.—Prepare a shallow cell and dryit (§ 24S). Select a clean cover-glass slightly larger than the cell. Pour upon thecover a drop of \o% solution of salycilic acid in 95% alcohol. Let it dry spon-taneously. Warm the slide till the cement ring or cell is somewhat sticky, thenwarm the cover gently and put it on the cell, crystals down. Press on the coverall around the edge (? 246); seal, label and catalog (§ 253, 308, 309). A preparation of mammalian red blood corpuscles may be satisfactorily madeby spreading a very thin layer of fresh blood on a cover with the end of a it is dry, warm gently to remove the last traces of moisture and mount bloodside down, precisely as for the crystals. One can get the blood as directed for theMicro-spectroscopic work [\ 210).. Fig. 137. Turn-Table for sealing cover-glasses and making shallow mount-ing cells. (Queen & Co.) \ 248. Preparation of Mouuting Cells.—(A) Thin Cells. These are mostconveniently made of some of the cements used in microscopy. Shellac is one ofthe best and most generally applicable. To prepare a shellac cell place the slideon a turn-table (Fig. 137) and center it, that is, get the center of the slide overthe center of the turn-table. Select a guide ring on the turn-table which is a littlesmaller than the cover-glass to be used, take the brush from the shellac, beingsure that there is not enough cement adhering to it to drop. Whirl the turn-tableand hold the brush lightly on the slide just over the guide ring selected. Aneven ring of the cement should result. If it is uneven, the cement is too thick ortoo thin, or too much was on the brush. After a ring is thus prepared removethe slide and allow the cement to dr
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