Flame, electricity and the camera; man's progress from the first kindling of fire to the wireless telegraph and the photography of color (1901)
Iles, George, 1852-1942 · New York, Doubleday & McClure co. · leaf 248
opening is provided ; so that when thecock is closed, as a is represented, thus obstructing the passage from the streetmain, water from above, after having passed the wheel, can find an easy exitthrough the end of the cock to the waste, along with that from the narrowpipe a, already referred to.… … Fig. 69.Hydraulic model, duplex telegraphy.
Fire · Electricity · Color photography
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