Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 317
The frame on which the slideFig. 241. carrying the object rests is hinged at its upper part,and kept in its true position by slight springs,which give way directly the slide is pressed by the objective. It isfound that springs firm enough to ensure the steadiness requiredfor high powers may yet be… … STAGE A PITTANCES 287
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