Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 202
1. Thecoarse - adjustment barwas rectangular, whichis theoretically inferiorto a prism, but it is wellsprung and works withgreat smoothness. Thefine adjustment is a leverof the second order, withthe milled head in themiddle of the bar, whichinvolves tremor, and thetube of the nose-piece isshort,… … partial. The sub-stage and mirror are good. It was a commanding N 178 THE HISTORY AND EVOLUTION OF THE MICROSCOPE instrument in its day, and was of excellent workmanship and finish ;but it was not equal to the strain of critical work with immersion objec-tives of great aperture. Nevertheless the…
Microscopy
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