The microscope; an introduction to microscopic methods and to histology (1901)
Gage, Simon Henry, 1851-1944 · Ithaca, N.Y. Comstock publishing company · leaf 264
. This device has been invented manj^ times.It illustrates well the adage : necessity is the mother of invention,for what teacher has not been in despair many times when trying tomake a student see a definite object and neglect the numerous otherobjects in the field. So far as the writer has been…
Microscopy
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