84 DESCRIPTION of a 



ment. But if the lunar part be added, then the mi- 

 nute circle mufl: be carried round by fimilar arms on 

 the infide of the globe, and an opening left, next the 

 hour circle, between the northern and fouthern hemi- 

 fpheres, for it to move in ; the two hcmifpheres being 

 connefled by 4, or more fmall connecting wires, which 

 may be detached at pleafure to remove the northern 

 hemifphere when there is occafion to come at the move- 

 ment. Or for conveniency the minutes may be fhown 

 on a circle round the north pole. DD is a brafs circle 

 moving round once in a year on the poles of the eclip- 

 tic, fhowing the different feafons. This being the circle 

 of illumination, one fide thereof may be made black 

 to diftinguifh the dark hemifphere. It is carried roimd 

 by the cannon E which turns round a firm fupporter 

 that fuftains the hoop BB, and of courfe the globe, &c. 

 The cannon carries round with it the circular plane FF 

 on the upper part of the foot to which is attached the 

 ftem G and which rifing as high as the centre of the 

 circle of illumination and at right angles to it, carries 

 on its top a figure of the fun, whofe place in the ecliptic 

 is pointed out on the edge of the foot, on which is alfo 

 drawn the figns of the zodiac, day of the month, &c. 

 Or if it fhouid be preferred the figns, day of month, &c. 

 may be drawn on the circular plane FF which being left 

 at reft, while the ftem bearing the fun, being connedled 

 with the cannon G will point out, ut iupra, the fun's 

 place in the ecliptic, &c. M reprefents the moon which 

 is carried round the earth in its proper period by the 

 arm L and axis K being connected with the plate P 

 which revotves round the pole of the ecliptic in about 

 19 years carrying the axis of the moon's orbit with it, 

 in an angle of 5^ degrees this is efFeclcd in the fol- 

 lowing manner. The plate P with its wheel O is 

 moved round a cannon fixed to the, hoop BB by which 



the 



