Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 60
and completeness of correction; and con-tinued progress has been since made in the same direction, bythe like combination of theoretical acumen with manipulativeskill. 17. The enlargement of the Angle of Aperture, and the greatercompleteness of the corrections, first obtained by the adoption ofMr.… … * See his Memoir in the Philosophical Transactions for 1829. 16 OPTICAL PEINC1PLES OF THE MICROSCOPE. made by Mr. A. Ross, that a very obvious difference exists in theprecision of the image, according as the object is viewed, with orwithout a covering of talc or thin glass; an Object-glass which…
Microscopy · Biology
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