Cekjlial and ‘Terrestrial Glebes. 85

sent the ecliptic, and then the poles of theglobe will also represent those of the eclip-tic ; the ecliptic line upon the globe will atthe same time represent the equator, inclinedin an angle of 2 3 4- degrees to the broadpaper circle, now called the ecliptic, andcutting it in two points, which are calledthe equinoctial intersections.

Now if you turn the globe llowly roundupon its axis from east to west, while it isin this position, these points of intersectionwill move round the same way; and the in-clination of the circle, which in shewing thismotion represents the equinoctial, will notbe altered by such a revolution of the inter-secting or equinoctial points. This motionis called the precession of the equinoxes,because it carries the equinoctial points back-wards amongst the fixed stars.

The poles of the world seem to describea circle from east to west, round the polesof the ecliptic, arising from the precessionof the equinox. This motion of the polesis easily represented by the above positionof the globe, in which, if the readerremembers, the broad paper circle re-presents the ecliptic, and the axis of theG 3 globe