A practical treatise on the use of the microscope, including the different methods of preparing and examining animal, vegetable, and mineral structures (1848)
Quekett, John, 1815-1861 · London, H. Bailliere · leaf 110
dy is supported nearlythe whole of its length on a strong arm, having a hollow frameat its top, after a plan first described by Mr. Powell, in thefifty-third volume of the Transactions of the Society of Arts.The coarse adjustment is made by a rack and pinion containedwithin the frame above noticed,… … Fig. 43. 76 PRACTICAL TREATISE ON THE MICROSCOPE. wide, and three-and-a-half inches apart, this being equivalentto a triangular bar of the same size. The fine adjustment ismade by a screw with a cone, against which the cradle, orportion of brass attached to the body, is firmly pressed bymeans of a…
Microscopy
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
