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Scientific American, Vol. 58, No. 16 (1888) (1888)
leaf 7
is The troughs are then filled with gravel, in the middle light, transportable telegraph poles which are supplied direction. of whichis buried the longitudinal timber carrying the with insulators. Furthermore, the construction of It is very important for the welfare of the troops that rail, and the… … Ransom says: ‘In original cost, expense of operating, cost of maintenance, outlay in applying to old roads, steam distances every other mechanical system.” © 1888 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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