Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 132
e p. 82. COLLINSS HAELEY BINOCULAR. 83 model; but is now made also on the Jackson model at the sameprice. The caps of the Eye-pieces are provided with shades, whichcut off the outside lights from each eye ; these can be adapted toany instrument, and the Author can speak strongly of their value… … Oollinss Haiiey Binocular. prism, and is also pierced with a vacant aperture; so that, bymerely sliding this box transversely until its aperture comes intothe axis, the instrument may be used as an ordinary Monocular;or, if the analyzing prism be made to take the place of the Wenham,whilst the…
Microscopy · Biology
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