...this nutation, of which the existence and quantity were first ascertained by Bradley. He found that the inclination of the earth's axis to the plane of its orbit, which is about 23^ degrees, is not constant, but varies several seconds backwards and forwards, and...

...pertains to the celeilial fphere alone. Its oblique polition to the equator (being a conlequence of the inclination of the earth's axis to the plane of its orbit,) is the principal caufe of the variety of the feafons : for if the equator and ecliptic were coincident,...

...considerable change in the annual heat or cold of a particular country. We have no reason to suppose that the inclination of the earth's axis to the plane of its orbit has ever been varied ; but strong; evidence to' the contrary. If this inclination has always been the...

...at the equator are always equal. Thus, the different seasons of the year are clearlyaccounted for by the inclination of the earth's axis to the plane of its orbit, combined with the parallel motion of this axis. 282. The motion of the sun, moon,, and stars, from...

...behind the sun. Tutor. If this difference between time measured by the dial and clock depended only on the inclination of the earth's axis to the plane of its orbit, the clocks and dial ought to be together at the equinoxes, and also on the 21st of June and the 21st...

...the circle which is the boundary of light and darkness.—All this beautiful variety is occasioned by the inclination of the earth's axis to the plane of its orbit. " Some say he bid his angels turn askance The poles of earth twice ten degrees and more From the sun's...

...described upon the terrestrial globe ? Mrs. B. It is convenient for the demonstration of a Variety of problems in the use of the globes ; and besides,...obliquity of the ecliptic shows the inclination of the eath's axis to the plane of its orbit. But to return to fig. 2. plate VIII. The spaces between the...

...described upon the terrestrial globe ? Mrs. B. It is convenient for the demonstration of a variety of problems in the use of the globes; and besides, the obliquity of this circle to the equator in rendered more conspicuous by its being described on the same globe; and the obliquity of the ecliptic...

...wire, t», is screwed, and its upper end is bent 23»° from 'the perpendicular, corresponding with the inclination of the earth's axis to the plane of its orbit. On the bent part of the wire is fitted a brass collar (but invisible in the engraving), [from .the...

...described upon the terrestrial globe F Mrs. B. It is convenient lor the demonstration of a variety of problems in the use of the globes; and besides,...same globe; and the obliquity of the ecliptic shows how much the earth's axis is inclined to the plane of its orbit. But to return to fig. 2. plate 8....