The microscope; an introduction to microscopic methods and to histology (1917)
Gage, Simon Henry, 1851-1944 · [Ithaca, N.Y.] The Comstock Pub. Co. · leaf 200
r this onemust light the drawing surface enough either by means of a portablelamp or by some means of letting in daylight. At the same timethere must be a screen to cut off the image where one is doing thefinishing. By removing the screen the image appears at any timeand serves to check the work. §… … and a substage condenser in addition to the condenser of the lanternor small lamp (fig. 49, 114), or light of sufficient aperture will notbe supplied to the microscope. In using the highest powers it isalso well to connect the substage condenser to the slide by homo-geneous liquid, as described in…
Microscopy · Microscopy -- Technique
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