on the Rotation of the Planets , See. 
r 33 
D. M. S. 
Fir ft biennial period, 1777, April 8 7 30 
177 9, June 6 10 10 
789 2 40 
The geocentric places of Mars at thofe times were,. 
s. D. ' " 
6 6 31 26 
7 l 3 48 30 
1 7 r 7 4 
turned into time at 4 // ,i 09 per minute of a degree and! Tub** 
traded, becaufe Mars is more advanced in the ecliptic* is 
789 2 40 o 
— 2 33 1:1,8. 
Divided by 768 rev. 789 o 6 48,2 
1 revolution = 24b. 39' 2 3", 03* 
D. H. M. s. 
Second biennial period, 1777, April 17 7 50 o 
1779, June 15 9 45 17 
789 1 55 
S. D. ' " 
Geocentric places 6 3 31 27 
7 12 40 23 
1 9 8 56. 
Turned into time 789 1 55 17 
andfubtraded — * 2 40 52 
— rtr — * 
768 revol. 788 23 14 25 
1 revolution =- 24 h. 39' 
Third 
