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 366
Fig. 215. The tube contained three lenses,tubes, giving different magnifications. … Fig. 216. and Bonanni used three similar The object for examinationwas held tight between twosprings and lighted by a lamp,whose rays were concentratedon the object by a true con-denser formed of two lenses,which could be brought nearerto or withdrawn farther fromthe stage. This instrument, as may…
Microscopy
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