The microscope; an introduction to microscopic methods and to histology (1901)
Gage, Simon Henry, 1851-1944 · Ithaca, N.Y. Comstock publishing company · leaf 155
tend directly across the spec-trum. § 200. Focusing the Slit.—In order that the lines or bands inthe spectrum shall be sharply defined, the eye-lens of the ocular shouldbe accurately focused on the slit. The eye-lens is movable, and whenthe prism is swung aside it is very easy to focus the slit as… … Fig. 12- Fig. 124. Fig. 125. Fig 123. (1). Section of the tube and stage of the microscope with the spectralocular or micro-spectroscope in position. Amici Prism ($ iSS).—The direct vision prism of Amici in which the centralshaded p> ism of flint glass gives the dispersion or separation into…
Microscopy
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