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 15
rally uses a vertical drawing sur-face, and gets the size by the greater or less distance (see alsofigs. II, 13). For large microscopic objects no ocular is used, and in mostcases no substage condenser. The converging cone of light fromthe large lamp condenser answers perfectly for the… … Fig. 6. Diagram showing the wiring and the relation of the parts for lantern slideprojection by means of the house electric lighting system. The arc lamp and its wiring and connection with a rheostat and the house system isthe same as in fig. 1, except that in this figure there is a knife switch…
Lantern projection · Projection · Drawing
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