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which is uniform ; the other motion of rotation is 
performed about the axe of the circle of the fun’s 
declination, which is a diameter of the equator j and 
this motion is produced by the adion of the fun on 
the redundant matter about the equator, and is conti- 
nually accelerated, from the continual application of 
the folar adion producing it. 
The point E, Jig. i. n° 2. which is the interfedion 
of the circumference of the equator and the circum- 
ference of the circle of declination, has two motions, 
whofe diredions are perpendicular to each other. 
Let Ee be the fpace, which it runs through in an in- 
fant d t, in the circumference of the equator, by the 
uniform diurnal motion, and let E e be the fpace it 
runs through in the fame inf ant, in the circumference 
of the circle of declination, by an accelerated motion, 
as has been explained. 
The point E, in vertue of thcfe two motions E e 
and E g, will not circulate either in the circumference 
£ e i^/' QE of the equator, or in the circumference 
EeP E‘ P E of the circle of declination, but forming 
the redangular parallelogram E e e g, the diagonal E e 
will be the elementary arc of the circumference E eqE\ 
in which the point E will circulate, and the angle 
e E e will be equal to the angle QJC q, and equal to the 
angle P' C p' which the pole P' runs through in an in- 
fant in the circumference P'p' Qjq P whofe plane 
is perpendicular to the plane of the circle of decli- 
nation ; and when the lines Ee, Ee are known at 
every infant, P p' will alfo be known, fince the 
angle e E e 1 = to the angle ^ C q = to the angle 
F Cp'. 
The 
