Carpenter, William Benjamin, 1813-1885 · London : John Churchill · leaf 160
eparately give threedifferent colours, in a frame resembling that in which hand-magnifiers are usually mounted, so that they may be usedsingly or in double or triple combinations; as many asthirteen different tints may thus be obtained; but the advan-tage of revolution is sacrificed.—When the… … Selenite Object-carrier. the glass sKdes in which objects are ordinarily mounted, witha ledge near one edge for the slide to rest-against, and a largecucular aperture into which a glass is fitted, having a film ofselenite cemented to it; this selenite stage or object-carrierbeing laid upon the…
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