Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 270
ose-piece, and sokeeps the several objectives which maybe inserted in position. It dates, in allprobability, from the end of the seven-teenth or the early part of the eighteenthcentury. But in the early days of the micro-scope rotating discs of objectives, as shownin fig. 187 (or, perhaps, older… … Fig. 1ST.—Rotating disc of ob-jectives.
Microscopy
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