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Scientific American, Vol. 86, No. 25 (1902) (1902)

leaf 7

An illustration from Scientific American, Vol. 86, No. 25 (1902), 1902, leaf 7
hine with its crew of Austin Manufacturing Company, of five men does work’ which Harvey, Ill. to whom we are in- would be a credit to a_ very debted for much of the informa- large force of laborers. Under tion found herewith, but the photo- favorable circumstances a_ ditch TRENCH DIGGER, SHOWING… … cross-bars and fiat blades the vapor are obtaized, and or scrapers. Fas- a powerful torch tened to each is produced with cross bar are two a flare ranging plow-shaped cut- ‘from 18 inches to ters, the latter 2 feet and a power being staggered, equal to upward so that the whole of 1,000 candles.…

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