Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 389
viary 1,1910).The data for regions north of latitude 5.5° are very meagre and discordant; the regions west ofHudson Bay where recent determinations have been made show considerable local disturbance;the lines north of latitude 70° are drawn largely from positions calculated theoretically,… … Fig. 459.—a simple dip-ping needle. 439. Magnetic Inclination or Dip. Fig. 459 shows aninstruineut in which the magnetized needle can move in avertical plane. The needle before beingmagnetized is so adjusted that it will restin any position in which it is placed, butwhen magnetized the iV^-pole (in…
Physics
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