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 28
Of Lenses and their properties. … Transparent sub-stances (in generalglass) cut insuch a mannerthat the luminousrays which traversethem, can be madeto converge orFig. 9. diverge, are termed lenses. There are two series of lenses : the convex series, and theconcave series. These series comprehend the following forms (fig. 9): —A The…
Microscopy
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