Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine (1914)

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240 MICRO-PROJECTION WITH DIRECT CURRENT [Cn. IX J B D u/\ C FIG. 134. FACE VIEW OF THE STAGE OF THE PROJECTION MICROSCOPE AND SECTIONAL VIEW OF THE STAGE WATER-CELL. (About half size) . (From The Microscope, Ninth Edition, 1904). A Sectional view of the stage with the stage watercell. 5 Metal part of the stage in section. 5 w. Stage water-cell. gsf Glass front of the stage water-cell. The microscopic specimen rests directly upon the glass front, and heat from the specimen is conveyed away by conduction. B Face view of the metal part of the stage of the projection microscope (fig. 121), and the optic bench. In this case the base (£) with V's is of cast iron as is also the block (£>). Both were prepared on a lathe (Compare fig 158, 159). E End view of the guide piece with V's. D Apparatus block. C Post of the stage in the block socket. Two set screws hold the post in place. It is better to use but a single screw for this. The stage proper has a very large opening, and the watercell inserted in this opening permits of the demonstration of specimens up to 65 mm. in diameter. specimens like those of the nervous system stained with Weigert's hematoxylin, or by the Golgi method absorb a great deal of the light