Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 175
in twoazimuths at right angles to eachother. The Achromatic Conden-ser of Messrs. Beck is a combi-nation of three pairs, of whichthe first and second are remo-vable, so that the back pair maybe used alone for the illumi-nation of objects viewed withlow or medium powers.—TheAchromatic Condenser of… … Becks Achromatic Condenser. * Transactions of the Microscopical Society, Vol. sv., p. 74. WEBSTER CONDENSER. 121 arrangement of stops. The Diaphragm-plate being perforated byapertures of different sizes, the largest of these (which transmitsthe entire pencil) can be partially closed by centric or…
Microscopy · Biology
Internet Archive · Medical Heritage Library · Public Domain Mark 1.0. Free to use for anything.
