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FIRST AND SECONDCLASS ACHROMATIC MICROSCOPES
DIRECTIONS FOR USE or MICROSCOPE TRANSMITTED ILLUMINATION 823
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achromatic condenser adjustment Amici prism aperture appearance arrangement binocular body binocular microscope brass plate Camera Lucida Canada balsam cell centre chromatic aberration colour compressor condensing-lenses crystal cylindrical fitting DESCRIPTION OF PLATE diaphragm direction disk disk-revolver dissection distance DOUBLE-IMAGE edge eyepiece field of view finger first-class instruments flat focus forceps front lens Goniometer higher powers holes illustrations images inch lamp lenses Lieberkuhn lines live-box markings micro micrometer mirror mounted moved movement Nicol's prism NicoVs object-glass oblique illumination obtained ordinary parabolic reflector piece of apparatus piece of glass placed plate of selenite Plate XVI Plate XXII Pleurosigma Podura-scale polarized light Popular Microscope position rays revolving right angles rotated salicine scale screw second-class selenite plate shown in fig shown in Plate slide small milled head specimens Spherical aberration stage stand structure surface Tegenaria atrica thin glass Tourmalines transparent tube turned round Urtica dioica Wenham's Binocular whilst