Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 82
, so as to catch the light-rays on their emergence from it; these it divides into two halves, * The Author cannot allow this opportunity to pass without expressing hissense of the liberality with which Mr. Wenham freely presented to the Publicthis important invention, by which there can be no doubt… … Stephensons liinocunPrisms. each, of which is subjected to internal Fig. 22. reflection from, the inner side of the prismthrough which it passes; and the slightseparation of the two prisms at theirupper end, gives to the two pencils b b,a divergence which carries them throughtwo obliquely-placed…
Microscopy · Biology
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