The microscope; an introduction to microscopic methods and to histology (1899)
Gage, Simon Henry, 1851-1944 · Ithaca, N. Y., Comstock publishing company · leaf 227
on of the Photo-Micro-graph.—After a successful negative has been made, it is desirable andimportant to know the magnification. This is easily determined byremoving the object and putting in its place a stage micrometer. Ifnow the distance between two or more of the lines of the micrometeris… … c
Microscopy -- Technique
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