ere W is a turned wooden rings, select for the field the one that comes support provided with a small shaft X, and having in nearest to being a true circle on the inside. its periphery an iron hoop r over which is slipped For the winding on this ring use No. 23 or a copper hoop Z. To be efficient… … of any size larger than No. 20. This winding Fig. 2.—ALTERNATING CURRENT MOTOR, EASILY CONSTRUCTED EQUATORIAL MOUNT TOR TELESCOPES.
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