. The microscope and microscopical methods. Microscopes; 1896. CH. VI.~\ MICRO-SPECTROSCOPE AND POLAR/SCOPE. 139 the polarizer and the object. If properly mounted, the selenite is very conveniently placed on the diaphragm carrier of the Abbe illuminator, just above the polarizer. A thin plate or film of mica also answers well. It is not necessary to use a selenite or piece of mica for the produc- tion of the most glorious colors in many objects. One of the most beautiful preparations, and one of the most instructive also, may be prepared as follows : Heat some xylene balsam on a slide until th
. The microscope and microscopical methods. Microscopes; 1896. CH. VI.~\ MICRO-SPECTROSCOPE AND POLAR/SCOPE. 139 the polarizer and the object. If properly mounted, the selenite is very conveniently placed on the diaphragm carrier of the Abbe illuminator, just above the polarizer. A thin plate or film of mica also answers well. It is not necessary to use a selenite or piece of mica for the produc- tion of the most glorious colors in many objects. One of the most beautiful preparations, and one of the most instructive also, may be prepared as follows : Heat some xylene balsam on a slide until the xylene is nearly evaporated. Add some crystals of the hypnotic medi- cine, sulphonal and warm till the sulphoual is melted and mixes with the balsam. While the balsam is still melted put on a cover-glass. If one gets perfect crystals there will be shown not only most beautiful colors, but the black cross with perfection. (Clark). It is very instructive and interesting to examine organic and inor- ganic substances with a micro-polarizer. If the objects enumerated in § 144 were all examined with polarized light an additional means of de- tecting them would be found. REFERENCES TO THE POLARISCOPE AND TO THE USE OF POLARIZED EIGHT. Anthony & Brackett; Behrens, 133 ; Behrens, Kossel und Schiefferdecker ; Car- noy, 61; Carpenter-Dallinger, 262, 269, 992 ; Clark ; Daniell, 494 ; Davis ; v. Ebe- ner ; Gage ; Gamgee ; Halliburton, 36, 272 ; Hogg, 133, 729 ; L,ehmann ; M'Ken- drick ; Nageli und Schwendener, 299 ; Queckett ; Suffolk, 125 ; Valentin. Physi- cal Review, I., p. 127. Daniell, Physics for Medical 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. , Comstock
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