Modern microscopy; a handbook for beginners and students (1912)
Cross, M. I, Cole, Martin J · Chicago, Chicago Medical Book Co. · leaf 66
ted above the eyepiece also with a dividedcircle. The quartz wedge can advantageously be placed in acarrier between the objective and the nosepiece, and the Ber-trands lens for observing the interference of figures of crystalsscrewed to the lower end of the draw-tube. A special eyepiecewould have… … Fig. 20.—Petrological Microscope.By Swift and Son ; designed by Mr. Allan Dick. 46 MODERN MICROSCOPY Now, all these fittings can be applied to an ordinary microscopeat any time, but where penological study is regularly undertaken,it is far better to be equipped with an instrument built for the
Microscopy
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