nd with
foreign earth admixtures, [hence one may conclude] they are further
removed from the mother earth and are more degenerate."

[68] M: pp. xlvii, 309, 328.

[69] M: pp. 18, 20, 44, 46, 69.

[70] M: pp. 59, 61, 63.

[71] M: pp. 60, 63.

[72] M: p. 110.

[73] M: pp. 60, 61.

[74] M: p. 62.

[75] M: p. 63.

[76] M: p. 60.

[77] M: pp. 19, 21, 43, 53, 61, 63, 184.

Gilbert's second induction was that they are "true and intimate parts
of the globe,"[78] that is, that they are piece of the "materia prima"
of all we see about us. For they "seem to contain within themselves
the potency of the earth's core and of its inmost viscera."[79]
Whence, in Gilbert's philosophy, the earthy matter of the elements was
not passive or inert[80] as it was in Aristotle's, but already had the
magnetic powers of loadstone. Being endowed with properties, it was,
in peripatetic terms, a simple body.

[78] M: p. 61.

[79] M: pp. 66, 67.

[80] M: p. 69. Gilbert is confusing Aristotelian matter and
an element. He includes cold and dry, with formless and
inert! See also Maier, _op. cit._ (footnote 17).

If these pieces of earth proper, before decay, are loadstones, then
one may pass to the next induction that the earth itself is a
loadstone.[81] Conversely, a terrella has all the properties of the
earth:[82] "Every separate fragment of the earth exhibits in
indubitable experiments the whole impetus of magnetic matter; in its
various movements it follows the terrestial globe and the common
principle of motion."[83]

[81] M: p. 63; bk. 1, ch. 17.

[82] M: pp. 67, 181-183, 235-240, 281-289, 313-314.

[83] M: p. 71. See also pp. 314 and 331. It is not clear,
at this point, whether he believed a "properly balanced"
terrella would be a _perpetuum mobile_.

The next induction that Gilbert made was that as the magnet possesses
verticity and turns towards the poles, so the loadstone-earth
possesses a verticity and turns on an axis fixed in direction.[84] He
could now discuss the motions of a loadstone in general, in terms of
its nature, just as an Aristotelian discussed the motion of the
elements in terms of their nature.

[84] M: pp. 68, 70-71, 97, 129, 179-180, 311, 315, 317-335
Gilbert implied (M: p. 166), that a terrella does not rotate
as Peregrinus said, due to resistance (M: p. 326), or due to
the mutual nature of coition (