Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 353
olid eye-pieces have also been used bothin England and America, but with no results that surpassed a well-made Huyghenian combination; but the best form of all of thecombinations which have been tried by us as positive single eye-pieces are the Steinheil triple loups; a section of one of these is-… … Fig. 280. COMPENSATING K VK-II K( T,S 323 seen in fig. 280. But a positive eye-piece was devised by li nn <l< n,consisting of two plano-convex lenses of equal foci ; tin; distance is tobe equal to two-thirds the focal length of one. The diaphragm w illof course be exterior. Abbes Compensating…
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