thed segment. In the ground. order to tighten the saw-driving belt, a tightening pul- s+ oe __——_—_—__ ley is secured on a lever fulerumed at the side of the The Utility of Inventions, wagon. It is, no doubt, true that when a new invention is PORTABLE ELECTRIC RAIL SAWING MACHINE. introduced which… … decade from 1870 to 1880 ELECTRIC RAIL SAWING M economical, sawing off the the population increased end of a 661g pound girder 30°08 per cent, while the rail in one minute. The total cost of sawing rails is number of persons employed increased 30 per cent. which does the boring is faced with black…
Internet Archive · Public domain (published before 1931). Free to use for anything.
