The microscope : its construction and management : including technique, photo-micrography, and the past and future of the microscope (1893)
Heurck, Henri van, 1838-1909 · London : C. Lockwood ; New York : D. Van Nostrand Co. · leaf 100
at the same time it remained perfectly circular. Charles Chevalier, so far as we know, never applied his pupil to one of his instruments. It remained merely a model, and like many of the ideas of this indefatigable inventor, was never practically applied. The Iris-diaphragm is superior to all… … SO THE CONDENSERS. a glass plate, whose centre is covered with a small black disc, maybe placed over a diaphragm with a large opening, or, still better (as isgenerally done), a similar disc may be fixed in the centre of a diaphragmby means of three thin brass strips. Diaphragms are placed below and…
Microscopy
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