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 34
erging beam of light can be obtained. The microscope is on a support giving a drawing distance of 25centimeters (10 inches), and the drawing surface is enclosed bya metal shield to keep out stray light. The lamp and the microscope are put in one line. For this thelamp is adjustable on a vertical… … ■ig. 13
Lantern projection · Projection · Drawing
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