[ *6 1 
that the Pole of the Equator, during a Period of the 
Moon's Nodes, moved round in the Periphery of a 
little Circle, whofc Center was 23 0 29' diftant from 
the Pole of the Ecliptic •, having itfelfalfoan angular 
Motion of so" in a Year, about the fame Pole: 
The North Pole of the Equator was conceived 
to be in that Part of the fmall Circle, which is 
fartheft from the North Pole of the Ecliptic, at the 
Time when the Moon's Afcending Node is in the 
Beginning of Aries : and in the oppofite Point of it, 
when the fame Node is in Libra . 
Such a Hypothecs will account for an Accele- 
ration and Retardation of the annual Prcceffion ; as 
alfo for a Nutation of the Earth’s Axis : And if the 
Diameter of the little Circle be fuppofed equal to 
18"; which is the whole Quantity of the Nuta- 
tion, as colle&ed from my Obfervations of y Dra- 
conis : then all the Phenomena in the feveral Stars 
which I obferved, will be very nearly folved by it. 
LetlPreprcfent the 
mean Place of the 
Pole of the Equator, 
about which Point, 
as a Center, fuppofe 
the true Pole to 
move in the Circle 
A BCD , whofe Dia- 
meter is 18". Let E 
be the Pole of the 
Ecliptic, and EP 
be equal to the mean 
Diftance between 
the Poles of the 
the Equator and Ecliptic j and fuppofe the true 
Pole 
r 
