THE USE OF THE CELESTIAL GLOBE. 335 



to the poles of the world, for shewing the declination of LECT. 

 the sun, moon, and stars ; and each quarter of the lat- ^ -8 ^ 

 ter, from the ecliptic at e and/, to its poles b and d, for 

 shewing the latitudes of the stars. 



In the north pole of the ecliptic is a nut b, to which is 

 fixed on one end of a quadrantal wire, and to the other end 

 a small sun Y, which is carried round the ecliptic B B, 

 by turning the nut : and in the south-pole of the ecliptic 

 is a pin at d, on which is another quadrantal wire, with 

 a small moon Z upon it, which may be moved round by 

 hand : but there is a particular contrivance for causing 

 the moon to move in an orbit which crosses the ecliptic 

 at an angle of 5$ degrees, in two opposite points called 

 the moon's nodes; and also for shifting these points 

 backward in the ecliptic, as the moon's nodes shift in the 

 heaven. 



Within these circular rings is a small .terrestrial 

 globe /, fixed on an axis K K, which extends from the 

 north and south poles of the globe at n and s, to those 

 of the celestial sphere at N and S. On this axis is fixed 

 the flat celestial meridian L L, which may be set direct- 

 ly over the meridian of any place on the globe, and then 

 turned round with the globe, so as to keep over the 

 same meridian upon it. This flat meridian is graduated 

 the same way as the brass meridian of a common globe, 

 and its use is much the same. To this globe is fitted 

 the moveable horizon M M, so as to turn upon two 

 strong wires proceeding from its east and west points 

 to the globe, and entering the globe at opposite points 

 01 its equator, which is a moveable brass ring let into 

 the globe in a groove all around its equator. The globe 

 may be turned by hand within this ring, so as to place 

 any given meridian upon it, directly under the celestial 

 meridian L L. The horizon is divided into 360 degrees 

 all round its outermost edge, within which are the 

 points of the compass, for shewing the amplitude of the 

 sun and moon, both in degrees and points. The celes- 



