Flame, electricity and the camera; man's progress from the first kindling of fire to the wireless telegraph and the photography of color (1900)
Iles, George, 1852-1942 · New York, Doubleday & McClure co. · leaf 146
ghtest in-crease ; in all such tasks the easilyregulated heat of electric originleaves nothing to be desired. Themanufacture of felt hats requires asustained heat at definite temperatures; this is suppliedmuch more satisfactorily by electric coils than by gas-flames. Metal-workers adopt electric… … Fig. 37. Metal shaped under electric heat. 112 ELECTRIC HEAT other tools are formed as readily as If in wax (Fig. 37).In this branch of industry the expert may excite the on-lookers wonder by tying a knot in a stout rod of steel asif he were manipulating a yard or two of rope. A newelectric machine…
Technology · Fire · Electricity · Photography
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