Now back to 20B - When Needle R completes 20 revolutions and comes back to its original Vertical position. Now Needle B is on 8B of the Dial of the Distance Piece. It means when the Needle B is on 8 it is 0B + 8B = 8B, also it could be 12B + 8B = 20B, (See Pg.37)
The Equatorial revolution takes us forward to between 21 & 22 Basics; these distances are once again divided into four parts. We reach 21 Basics and ¾ of the Distance between 21B & 22 B i.e. ¾ x 60 = 45 ranges. So needle R makes 21 complete revolutions and thereafter revolves forward another 45 ranges. This indicates on the Earth’s equator, a ¼ less than 22 Basics (79200 Chkm - ¼ x 3600 Chkm = 79200 Chkm - 900 Chkm = 78300 Chkm). We have travelled while riding the Earth’s Equator from 0B, (i.e. B=0). And the needle B would have come to 21 B and have Moved forward ¾ the Distance between 21 & 22 B. The same would be in the case of 21B, 22B as in the case of 20B, which has been already explained. Thereafter 24B and 0B would be end of the old revolution and which would coincide with the start of new revolution. Distance Relationship between EECD and DP DCD.
The Diameter of the Distance Pieces in Fig. 20 on page 37 is about 25mm which x p=78.5, 78.5/60= 1.309, but we want only 1 and not in addition .309. This is possible if we take a Distance Piece having a Circumference of 60 mm and then dividing it by p=19.1mm Diameter. Distance Pieces of this size have been given on Page 40, Fig.21 which has been reproduced here from page 21 Consisting of three Dials P, R & B. From Fig. 11 we see that when needle R makes a full Revolution 60 R i.e. = 1B which is E/12 or 60 mm/12=5mm.
This is shown as Needle B moving from 0 to 1 i.e. 5 divisions as by construction each division is 1mm. Therefore 1B= 3600 Chkm movement of the Equator is shown as 5mm movement of Needle B on the Distance Piece. The same 1B = 3600 Chkm movement of the Equator is shown as a complete Dial Revolution i.e. 60 R= 60 mm by Needle R. These 60R/4 =15R or 15 mm movement of Needle R is also a quarter of 60mm of the full Dial movement. Seeing Page 37 Fig.20. Looking at 9B as also having 1mm Divisions on the Dial circumference, Needle B has travelled 5x9= 45mm on the Distance Piece for 3600x9=32400 Chkm by Earth’s Equator. Once again looking at the Dial of the Distance Piece showing 10B.15R. and considering the Dial to have 60 Divisions and each Division being 1mm., we have the movement of Needle B = 10x5mm= 50 mm on the Distance Piece Dial which indicates the movement of the Equator = 3600Chkm per B and (10B=10x3600Chkm). Also Needle R has moved 15 R and1R=60P. As such needle B moves (1/60R x 15R) x B = ¼B = 5mm/4=1.25mm. As such the movement of 36000 + 900 Chkm =36900 Chkm by the Equator is given by the movement of 50mm +5mm/4mm+1.25mm = 51.25mm on the Distance Piece and this is also 10B of Needle B and 15 R of Needle R.