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 271
an inch thick, having a piece ofraised brass screwed to it, against which objects mayrest when the microscope is inclined; in the centre of thebrass plate, there is a hole, one inch in diameter, into which isfitted a ring of the same metal, with a shoulder on its under* Op. Cit., p. 25. 230 USE OF… … Fig. 142. endless screw, turned by the small handle seen on the rightside of the figure. P A|, P Af, P A-J, represent three brasscells, into each of which are burnished two plates of thin glass,having between them films of selenite of different thicknesses.The dart at P A denotes the direction of…
Microscopy
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