Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 83
ontal—the observer can lookat his object at Ithe inclination which he finds most comfortable.The angle to which the prism is worked can be varied to suit indi-vidual requirements; but if it should be desired to use the instru-ment with Polarized light, it will be found advantageous that… … Stephensons Erecting Prism. STEPHENSONS ERECTING BINOCULAR. 39
Microscopy · Biology
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