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 84
n a higher magnifying power is required, the formgenerally used is that known as the Coddington lens, whichconsists of a sphere of glass, around the equator of which atriangular groove has been cut, and the groove itself subse-quently filled up with opaque matter, as represented in sectionby fig.… … fig. 26, orand
Microscopy
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