Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 63
nce of the lens being tooclose to the object in all but low powers, CharlesChevalier, in his Manuel du Micrographe (1839),Briicke lens, proposed to place above a doublet a concave achro-matic lens, the distance of which could be varied atpleasure. The effect of this combination is to increase the… … COMPOUND MICKOSCOIK 39 Avith a doublet alone. The further the concave lens is removed fromthe latter, the greater will be the amplification.1 This combination, applied to lenses for examining the eye andskin, allows the use of doublets which leave a considerable distanceabove the object, and it is…
Microscopy
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