Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 217
Fig. 145. Wright for a finder. The eye-pieces were provided with rings, likePowell and Lealands, outside the tube to govern the depth whicheach should slide into the draw-tube, by which means the diaphragmis in the same place whatever the depth of the eye-piece employed, … Fig. 11C.—Messrs. R. and J. Becks third-class micrcscope. A GOOD STUDENTS M ](]{< )SCOPE 193 and it was constructed to do critical work with the highestpowers. Another form of this instrument has recently been introduced bythe firm of Chas. Baker, of Holborn, London. It arose in a sugges-tion by…
Microscopy
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