Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 176
glass of the latter serving as a condenserto receive the cone of rays reflected upwards from the mirror, andto make it converge upon a smaller Achromatic combination, which•consists of a double-convex lens of crown, with a plano-convex lensof flint, the plane side of the latter being next the… … Becks New AchromaticCondenser. 122 ACCESSORY APPARATUS, Tig. 75. effect of those transmitted through the peripheral portion of the*ordinary Achromatic Condenser. When, on the other hand, thiscombination is nsed with a diaphragm that allows only the centralrays to pass, these rays meet at a small…
Microscopy · Biology
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