Scientific American Volume 47 Number 18 (October 1882) . NUT TAPPING MACHINE. DURRELLS PATENT. No. 1 Machine, 900 lb., 7 spindles,a 1,050 72 600 3 Capacity of 7 Spindles, 8,000 per10 to be an indispens-able tool Manufactured byHOWARD BROS., Fxedonia, N, Y.

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectpatente, bookyear1882