The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 66
nati in 1815, at Chicago in 1832, MAGNETISM. 49 at Salt Lake City in 1873, ^^id will attain it at SanFrancisco, as computed, in 1893. In 1890 declination, throughout the interior of theUnited States, was tending westward; west declinationincreasing and east declination diminishing, while atthe… … rrom U. S. Coast andGteodetic Sur^ey. Fig. 22. The secular periods of dip and magnetic intensityare apparently the same as those of declination. The earliest reliable observations for the UnitedStates are those given in Halleys chart for the year1700. The agonic line, moving eastward, then passed…
Electricity · Magnetism
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