[Sidenote: All the North regions are habitable.] Therefore I am at this
present to proue, that all the land lying betweene the last climate euen
vnto the point directly vnder either poles, is or may be inhabited,
especially of such creatures as are ingendred and bred therein. For indeed
it is to be confessed, that some particular liuing creature cannot liue in
euery particular place or region, especially with the same ioy and
felicitie, as it did where it was first bred, for the certeine agreement of
nature that is betweene the place and the thing bred in that place; as
appeareth by the Elephant, which being translated and brought out of the
second or third climat, though they may liue, yet will they neuer ingender
or bring forth yong.[63] Also we see the like in many kinds of plants and
herbs; for example, the Orange trees, although in Naples they bring forth
fruit abundantly, in Rome and Florence they will beare onely faire greene
leaues, but not any fruit: and translated into England, they will hardly
beare either flowers, fruit, or leaues, but are the next Winter pinched and
withered with cold: yet it followeth not for this, that England, Rome, and
Florence should not be habitable.

[Sidenote: Two causes of heat.] In the prouing of these colde regions
habitable, I shalbe very short, because the same reasons serve for this
purpose which were alleged before in the proouing the middle Zone to be
temperate, especially seeing all heat and colde proceed from the Sunne, by
the meanes either of the Angle which his beames do make with the Horizon,
or els by the long or short continuance of the Suns presence aboue ground:
so that if the Sunnes beames do beat perpendicularly at right Angles, then
there is one cause of heat, and if the Sunne do also long continue aboue
the Horizon, then the heat thereby is much increased by accesse of this
other cause, and so groweth to a kinde of extremitie. And these two causes,
as I sayd before, do most concurre vnder the two Tropicks, and therefore
there is the greatest heat of the world. And likewise, where both these