Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 160
follows {Fig. 61):—Aboveits Eye-glass,which is achromatic, and madecapable of focal adjustment bythe milled-head b for rays ofdifferent refrangibilities, thereis placed a tube a, containing aseries of five prisms, two offlint-glass (Fig. 62, p p) inter-posed between three of crown(c c c), in such a… … Micro-Spectroscope.
Microscopy · Biology
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