Frigid Zone

Owing to the obliquity of the ecliptic, the earth's surface is divided into five zones, namely, the torrid, situated between the parallels of 23 deg. 28 min. N. and 23 deg. 28 min. S.; the temperate, extending from the torrid zone to the parallel 66 deg. 32 min. north and south; the frigid, extending from the temperate zones to the poles.