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 12
the microscope is in focus. By a slightmovement of the mirror the field will become evenly lighted. drawing with projection apparatus l8s Use of the Substage Condenser in DrawingFor objectives of i6 mm. (2-3 in.) and higher the substagecondenser can be used. It will insure the possibility of… … Fig. 4 Fig. 4. Black disc at the end of the lamp-condenser tube to cut off stray light and toreceive the spot of light reflected back from the substage condenser. C. The lamp condenser; I, the spot of light reflected back from the substage con-denser. rule it will be found that for drawing, the…
Lantern projection · Projection · Drawing
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