. The microscope; an introduction to microscopic methods and to histology. Microscopes. 384 PREPARATIONS BY THE PARAFFIN METHOD [Ch. XI half an hour or more. The slower drying in air is better if one has plenty of time. Some tissues are very difficult to get perfectly smooth, as just de- scribed. If fine wrinkles persist, one can sometimes overcome the difficulty by letting the sHde cool and then covering with a piece of fine tissue paper slightly moistened; press down firmly with the ball. Fig. 230. Lantern with Daylight Glass. The Top is Flat and Serves Well for Spreading Sections. (From the
. The microscope; an introduction to microscopic methods and to histology. Microscopes. 384 PREPARATIONS BY THE PARAFFIN METHOD [Ch. XI half an hour or more. The slower drying in air is better if one has plenty of time. Some tissues are very difficult to get perfectly smooth, as just de- scribed. If fine wrinkles persist, one can sometimes overcome the difficulty by letting the sHde cool and then covering with a piece of fine tissue paper slightly moistened; press down firmly with the ball. Fig. 230. Lantern with Daylight Glass. The Top is Flat and Serves Well for Spreading Sections. (From the Anatomical Record). of the finger on the sections. Then take hold of the edge of the paper and roll it off the sections. Unless one is careful the sections are liable to come away with the paper instead of adhering to the slide. As the water dries out the spread sections come in very close con- tact with the glass and adhere quite firmly to it. The thinner the sections the more tightly do they stick. This makes it possible to perform the rest of the operations on the slide. One has to be care- ful not to let strong currents strike the sections. § 621. Deparaffining in xylene.—This is accomplished by using a solvent of paraffin. The best and safest one to use in a laboratory. 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 Gage, Simon Henry, 1851-1944. [Ithaca, N. Y. The Comstock publishing company
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