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View showing the 8-foot Sigafoos Rotary Tunneling Machine when the electric current was turned into the great motor, and the ponderous machine, weighing 29 tons, revolved in its cradle and delivered the first blow ever struck by a tunneling machine on a contract in America. Pictured are (1) R. B. Sigafoos, inventor; (2) T. R. Sigafoos, master mechanic; (3) A. Struthers, chief engineer; (4) F. M. Keiser, secretary and treasurer, and other officers and directors of the company with about fifty guests present, also “Jobe,” the pack mule of 1849. |
