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 41
ubstituted twoplanoconvex lenses, which touched each other in the middleof their convex surfaces; by this arrangement a flat field ofview was obtained, at the same time with a considerableamount of magnifying power. It is said,* that the compoundbody of this instrument, when shut up, was sixteen… … power was increased by draw tubes from 40 to 140 times.The latter, or S. Campani, of Bologna, was also a maker of tele-scopes and microscopes, and a successful rival of the former,his instrument was somewhat similar to that made by Divini,being on the principle of an inverted telescope,…
Microscopy
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