Terrella

Definition and stakes

by William Gilbert,  On the Magnet — Book II. Chap. 34… (1900)

“ Let a b be the earth or a somewhat large terrella, also a b a smaller terrella. There is set up above the Northern pole of the smaller terrella a spike larger than the pole b of the smaller terrella can raise, if it is turned round to the higher parts. And the pole a of the smaller terrella has its strength from the larger, declining from the Zenith to the plane of the horizon or to the level. ”
Source: Wikisource

by William Gilbert,  On the Magnet — Book II. Chap. 34… (1900)

“ Let there be given a terrella of no contemptible power, or a long loadstone with equal cones as polar extremities; but in any other shape which is not exactly round error is easy, and the experiment difficult. In the Northern regions, raise the true North pole of the terrella above the horizon straight toward the zenith; it is demonstrable that it raises up a larger iron spike on its North pole, than the South pole of the same terrella is able to raise, when turned in the same way toward the highest point of the sky. ”
Source: Wikisource

Portrait of George Allan England George Allan England,  Darkness and Dawn

“ Naked and ugly the country stretched away, away to its black horizon, ridge after ridge of rolling land stubbled with sparse, limbless trunks and carpeted with cinders.
A dead world truly, it seemed--how infinitely different from the lush, green beauty of the territory south of the New Hope, a region Stern still could make out as a bluish blur, far to southward, through his binoculars.
”
Source: Gutenberg

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