Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 244
of theretina adjoining those which actually receive the image. The ends of pieces of iron heated to incandescence bythe blacksmith for welding seem to be unduly enlarged—an appearance due to irradiation. Without doubt the most striking illustrations of irradia-tion are to be found in electric… … An Example of Irr a small lead pencil. In viewing an ordinary incandescentlamp, it is difficult to believe that the delicate filament is notin some way immensely enlarged by the electric current orby the heat, but the experiment illustrated by the engravingshows that the size of the filament is…
Physics · Lantern projection · Electric apparatus and appliances
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