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Scientific American, Vol. 63, No. 3 (1890) (1890)

leaf 3

An illustration from Scientific American, Vol. 63, No. 3 (1890), 1890, leaf 3
t; (8) the rod mnst_ be per- patent issued to Mrs, A. La Guayra Mayo, of West fectly continuous; and, lastly (4), the rod must be effi- ciently connected with the ground. Duluth, Minn. The device has two main parts, the gauge baranda 1. The sharpness of the point is insured by gilding it or coating… … SEWING MACHINES. est link, a corroded conductor, such MAYO’S GUIDE FOR SEWING MACHINES. as has been described, is perfectly The invention herewith illustrat- useless. ed relates to an improvement espe- 4. The earth connection. It is not easy in all cases that require a wider hem than the ordinary…

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