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 111
he cylinder arrives just halfway between two successive notches,the thread registers o (Zero). The object is placed so that the threadstouch it on both sides ; the number of notches which the moving threadhas passed, multiplied by ioo, and added to the number registered bythe cylinder, gives the… … CAMERA LUCIDA. 91 For the parallel thread micrometer, and also for the ordinary, eyepiece micrometer, the actual length represented by a division must bepreviously ascertained, always keeping the tube of the microscope ofconstant length. We shall show how this is done in the chapter treatingon the…
Microscopy
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