74
WILLIAM GILBERT
circle towards the pole in each direction. Such is the power reposed in the undivided stone. From A vigour is sent to B, from A, B, to C, from A, B, C, to D, and from them likewise to E. In like manner from G to H, and so forth, as long as the whole is united. But if a piece A B be cut out (although it is near the æquator), yet it will be as strong in its magnetical actions as C D or D E, if torn away from the whole in equal quantity. For no part excels in special worth in the whole mass except by what is owing to the other adjoining parts by which an absolute and perfect whole is attained.
Diagram of Magnetic Vigour,
transmitted from the plane of the Æquator
to the periphery of the terella,
or of the earth
transmitted from the plane of the Æquator
to the periphery of the terella,
or of the earth
H
