Guy's Elements of astronomy : and an abridgment of Keith's New treastise on the use of the globes (1864)
Guy, Joseph, 1784-1867, Keith, Thomas, 1759-1824. A new treatise on the use of the globes · Philadelphia, C. Desilver · leaf 83
and that to the south thetropic of Capricorn. The Polar circles circumscribe the poles of theworld, at the distance of 23^ degrees. That on thenorth is called the Arctic, and that on the south theAntarctic circle. The distance of these polar circles from the poles being fixed at23|*>(Uie same as… … The Meridians are so called because, as the earthrevolves on his axis, when any one of them is oppositeto the sun it is mid-day or noon along that line. Twen-ty-four of these lines are usually drawn on the globes^to correspond with the twenty-four hours of the day..Not that these are the only ones…
Astronomy
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