Recent developments in drawing by the aid of projection apparatus used on the house lighting system .. (1912)
Gage, Simon Henry, 1851-1944 · n.p. · leaf 25
for right angled carbons.By means of the optical bench carrying all the apparatus, thedifferent parts are pulled forward so that the microscope tubeand mirror project over the drawing shelf. This is adjustableup and down for varying the magnification. The stage of the microscope (st) is independent… … Fig.
Lantern projection · Projection · Drawing
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