^ ^ 
i 1035 ) 
the Semiduration, and you will have the time of the fm- 
merfion, or if it be more than 500, adding the fame, 
it will give the time of the Emerfion. 
But Note, the times thus found are equal time, ftill 
to be reduced to the Apparent : and that in the B/(fex- 
tile Year, after February ^ one Day is to be dedu<fled 
from the Day of the Month. 
The lefs skilful may perhaps be pleas’d with an 
Example or two, which may ferve them to imitate. 
Let it be required to find the time of the immerfion 
of this Satellite into Jupiter s fliadow, November the 
^th 1719. in the Morning. The Work (lands thus. 
D. h. ' " 
Nu. A. 
Nu.B. 
1719. I. 6.11.13 
872 
396 
Novembi 7 . 1 1 . 53 . 29 
72 - 
yj 6 
Conj. Med. 8 . 1 8 . 4.42 
944 
iEquat. 1 . 51 *55 
10 AEq. B. 
^quat* ll> 10.26 
^quat.IIT. 3*^^ 
182 B. .^quat. 
8.19.10.27 
1 . 6.33 Semidur^ Subfi, 
Novemb, 8*i8* 3*^4 
So that by this Catcuks^ on the ninth of Novemb*. 
at 4 Minutes after 6 in the Morning, equal Time, 
may be feen the Immerfion of thb Satellite into Jupk 
ters fliadow. 
Another Example (hall be of the Emerfion on tha 
fifth of April 17x0* viz^ 
