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 28
cular, or the draw tubeand ocular can be removed from the large microscope tube, andthen objectives alone used, thus giving very large fields.If desired for projection on a vertical screen, the apparatus ro-tates on a central axis to the horizontal position.The vertical position is advantageous for… … Fig. U
Lantern projection · Projection · Drawing
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