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Scientific American, Vol. 43, No. 11 (1880) (1880)

leaf 4

An illustration from Scientific American, Vol. 43, No. 11 (1880), 1880, leaf 4
A is the base of the instrument, made | adjusted from one eighth inch upward, and the pressure of | Testing Bureau of the Pennsylvania Railroad Company, of wood and brass. G G are glass legs supporting an arm of | the rollers on the work passing through the machine can be! Mr. Holman, Secretary of… … tested, and stood the severe strain of 29 tons Persons: ought -never to stand near a tree nor a house, nor even a building provided before it showed any signs of separation. The chain of the American Company, how- with lightning conductors, for shelter. My portion of thickness from the two straight…

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