Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 27
gles to a. Let the system beadjusted by means of wax or a pin c, until it is in neutral equilibriumabout b as an axis, when a is pointing east and west. Then let o bestrongly magnetized by stroking one end of it from the middle outwith the N pole of a strong magnet, and the other end from the… … Fig. 15. Dip of the Magnetic Needle. 19 10 ELECTRICITY AND MAGNETISM zone, to dip so as to make an angle of from 60° to 75° with the hori-zontal. This shows that in the latitudes mentioned the earths mag-netic lines are not at all parallel to the earths surface. The anglebetween these lines and the…
Electrical engineering
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