Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 41
n laid as a joist is only one-fourth of its breadth taken flatwise, so we must divide four intosixteen and find that our net gain in stiffness is in this case four-fold. Here let us for a moment dwell upon the two opposite ways inwhich strength may be brought into play, as either compression or… … Telegraph poles under compression. Wires under tension. TENSION AND COMPRESSION 9 stretched upon the ground before being set in place, and thenafter it is erected and duly laden. Should this downward thrustbe excessive, the pole would be crushed and broken down. Thestrung wires are not in…
Inventions · Inventors
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