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 145
three being employed withthe highest powers, or two, or even one, with the lowest. Polarizing Apparatus.—This consists of two prisms of cal-careous spar, constructed after the plan of Mr. Mcol, of Edin-burgh, and composed each of two pieces of the same spar,cemented together so as to transmit only… … ACCESSORY INSTRUMENTS. 105 denser; upon this plate the tube carrying the prism is made torevolve by turning the large circular plate at the bottom with
Microscopy
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