Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 208
Fig. 138.—E. and J. Bocks No. 1 stand. … Fig. 139.—Zentmayers microscope 184 THE HISTORY AND EVOLUTION OF THE MICROSCOPE latter, however, depends for its action upon a loose ring opposed on oneside by a spring which is counteracted at will by screws, so alteringthe position of the centre of the sub-stage. It is not the best formfor so…
Microscopy
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