Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 133
r, of not being then Binocular. It has also a * nose-piece carrying two Objectives, by a sliding movement of whichone power may be substituted for the other.* 68. Swifts Challenge Microscope.—The instrument constructedunder this designation by Messrs. Swift, is one of which it may befairly said… … Swifts Challenge Microscope. and substantial without being heavy; and when the limb is broughtto the horizontal position, resting on the cross plate between the * The price of this instrument, with Mechanical rotating Stage, two pairsof Eye-pieces, two Objectives (either a 2-inch of 12°, or a…
Microscopy · Biology
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