[ 1 7 1 3 
predion, it be not a direct Proof of the Accele- 
ration, it may nevcrthelefs help to limit its Quantity. 
This Eclipfe was in the Year before Chriit 721. 
March 19. The Middle whereof at Babylon, by the 
Tables, was March ip. io h 2 6' apparent Time} 
and the Beginning at b' h 32', the apparent Riling 
of the Moon at that Place was about y h 46' After- 
noon j fo that the obferved Beginning of the Eclipfe 
was at lead 6“ 46' Afternoon, i. e. not above 
before the Beginning, by the Tables : Wherefore the 
Moon’s true Place could precede her Place by Com- 
putation but little more than yo' at that Time. 
If we take this Acceleration to be uniform, as the 
Obfervations whereupon it is grounded arc not fuf- 
ficient to prove the Contrary, the Aggregate of it 
will be as the Square of the Time: And if we fup- 
pofe it to be 10 " in too Years, and that the Tables 
truly reprefent the Moon’s Place about A. < D. 700. 
it will bed agree with the before-mentioned Ob- 
fervations ; and the Difference between the Moon’s 
Place by the Tables and her Place in the Heavens, 
will be as follows. 
Y z 
Years 
