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Description and Use of the

the other, which is on the south side of it,the tropic of Capricorn.

174. The space between these two tro-pics, which contains about 47 degrees, wascalled by the ancients, the torrid zone.

The two polar circles are placed at thefame distance from the poles, that the twotropics are from the equator.

One of these is called the northern, theother the southern polar circle.

These include 23! degrees on each sideof their respective poles, and consequentlycontain 47 degrees, equal to the number ofdegrees included between the tropics.

175. The space contained within thenorthern polar circle, was by the ancientscalled the north frigid zone, and that withinthe southern polar circle, the south frigidzone.

176. The spaces between either polarcircle, and its nearest tropic, which containabout 43 degrees each, were called by theancients the two temperate zones.

177. Whenever any parallel pastes throughtwo places on the terrestrial globe, theseplaces have the same latitude.

Also