William Gilbert of Colchester, physician of London, On the loadstone and magnetic bodies and on the great magnet the earth. A new physiology, demonstrated with many arguments and experiments .. (1893)
Gilbert, William, 1544-1603, Mottelay, Paul Fleury, b. 1841, tr, Wright, Edward, 1558?-1615 · New York, J. Wiley & sons · leaf 222
le, and north isturned away from north, the energy and forces of its poles areaugmented. Hence the north pole of a terrella in such posi-tion lifts a heavier piece of iron than the south pole does if thatbe turned away. In like manner the south pole, gaining force fVJ/y A LOADSTONE IS OF DIFFERENT… … also in the southern parts of the terrella, the case is reversed,for, there, the south pole of the terrella is strongest when distal,as is the north pole of the terrella when it faces the earthor terrella. The farther a place is from the equinoctial line,whether of the earth or of a terrella, the…
Magnetism
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