Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 387
the concave mirror, the mirror being placed at the distance of its principalfocus from the object. Hut the manner in which it is usuallv done,from want of thought or knowledge, or both, is shown in tig. 304, 354 PRACTICAL MICROSCOPY where it is manifest that there is a total disregard of the true… … Fig. 804.—Erroneous method of arrangement for diffused daylight. Iiaving the mirror fixed upon a sliding tube, so that its focal pointmay be adjusted. It is also important here to note that in daylight illumination
Microscopy
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