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 275
on at uupon the plate s which fits upon the traversing stage of themicroscope. The ring o may also be graduated, if thoughtuseful, and thus rendered convenient for investigations bymeans of polarized light. When a crystal, or any angle thereof, is viewed throughthe prism attached to the goniometer,… … Fig. 149. Fig. 150. Fig. 151. 149, be the angle to be measured, the crystal being adjustedproperly, as hereinafter explained. Place the vernier at zero,and there clamp it fast; then revolve the tube b containingthe prism until the lines forming one side of the angle to bemeasured coincide in both…
Microscopy
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