Modern microscopy; a handbook for beginners and students (1912)
Cross, M. I, Cole, Martin J · Chicago, Chicago Medical Book Co. · leaf 130
d between thenosepiece and the objective, it causes a separation between thesetwo, which interferes with the performance of the binocularprism, because the closer the back lens of the objective can bebrought to the binocular prism, the more perfect will the visionbe. Under these circumstances the… … Fig. 46.—Darkers Selenites. Microscopes on p. 219. For use with the polariscope, varietiesof tints and a background of colour can be obtained by theemployment of selenite films. These, in the cheapest form,are mounted in the same way as ordinary microscopic objects;but a still greater variety of…
Microscopy
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