[ ] 
In this Example the true A&omaly is x 20®. 41V 
2 5", 1 ; and confequently the Equation of the Centre 
no more than 41'. 25", 1. 
Example III. 
For the Orbit of the Comet 0/1682. 
To know the mean Anomaly of this Comet to any 
given Time, it is to be premifed, that it was at the 
Ferihelion in the Year 1682, on the 4th Day of 
September, at 21 Ho. 2 2 Min. equated Time to the 
Meridian of Greenwich , and makes its Revolution 
about the Sun, as Dr. Halley has difcover’d, in 7 7 1 
Years. 
The Ferihelian Diftance p is, according to his De- 
termination, 0,0326087 Parts of the mean Diftance 
t. So that the conftant Numbers for the Orbit will 
be, »= 3, 1676061; 7 '=o, 2074272 ; 5 5 =o, 00665)8675 
and the limiting Angle p will be about 
3 t 
Minutes or 7 of a Degree. 
In the Orbits of Comets, the Rule for the firft Af- 
fumption of the Anomalia Eccentri is generally fuf- 
ficient without Correction. 
Thus, fuppofe the mean Anomaly Mto be 0,072706, 
(as it was at the time of an Obfervation made at Green- 
wich on the 30th of Auguft 1682, at 7' 1 . 42'. rEq.T.) 
then the general Rule (which muft be here ufed, lince 
the Angle of mean Anomaly is not above 4 or 7 times 
lefs than the limiting Angle) will give n't- A or B = 2 9 . 
12'. 48", 7, erring about ~ik of a Second from the true 
Anomalia Eccentri, 
F f * Btof 
