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Scientific American, Vol. 77, No. 11 (September 1897) (1897)

leaf 4

An illustration from Scientific American, Vol. 77, No. 11 (September 1897), 1897, leaf 4
xperimental purposes. inches in length from the face of the bolt head to the but reverse the ring and carefully carry the marks Having wound and mounted the field bobbins and top of the screw. The holes must be just large enough around to the other side and go through and meet the screwed the field… … volt mains, but in each and every case with Fig. 8. a 110 volt lamp in series with the field. Fig. 6. Should the field winding ever be connected drill will surely travel a little out of the line intended directly with the 110 volt circuit, an accident would the bolt were larger the field would not…

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