15) is worked from a relay, the dying away of the magnetism in the iron cores of the electromagnet, when the relay tongue moves from the Spark marking to the spacing side, i.e. [Please select]
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These holes are to be threaded for the 3/4-inch cores (A). [Please select]
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This bar holds together the upper ends of the cores, as shown in Fig. [Please select]
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Cores and forms were all cleaned and greased each time they were used. [Please select]
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Simpson's is the only touch which cores to me in the darkness. [Please select]
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At the start the residual magnetism of the magnet cores gives a weak field. [Please select]
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I have counted in one heap the cores of two hundred and thirty-nine pitch-pine cones which had been cut off and stripped by the red squirrel the previous winter. [Please select]
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These bolts are the magnet cores (K), 6 inches long, but they may be even longer, if you bore several holes (N) through the bench so you may set over the tailpiece. [Please select]
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