8 M E M O I K S of fie 
S "" ' ff 
The longitude of the fun from the firll ftar of 7 , 
^nVi - ^ - - -^1 ^ ^5 44 00 
The longitude of Mercury feen from the fun 015 44 00 
The diftance of J^fr^^ry from the fun 313(^5 
. _. from the earth (^7591 
The angle of the inclination of ilfe;Yw;ys orbit o <J 54 c© 
The motion of Mercury, feen from the fun, ? i -o 8 
in 6 hours — — — — 5 ^ ^ 
. of the fun in the fame 6 hours o o 1 5 5 
Hence the motion of Mercury from the fun in? 
d hours — — — --.^5^5 15 53 
And his motion from the fun feen from the 7 
earth in 6" hours — — — ^009512 
And the angle of the viiible way o£ Jlfercury? ^, 
within the fun with the ecliptic ^ -^ J° 3 15 00 
Hence the motion of Mercury in his vifible 7 
orbit in (J hours — -^ - ^ o o 35 40 
Then the motion of Mercury in a fidereal year? 
four revolutions beiides is, — — ■ — 5 
Therefore in 1 5 years — — — 11 
There are therefore wanting to 54intire revo-? 
lutions — — — — 5 
Which Ipace Mercury runs over in — — 
By which the fun's place is advanced, and Mercury, 
pofited in the node, is as much diflant from the 
conjunction of the earth — — — 
But that arch feen from the earth becomes — 
Whence from the given angle of the vifible way S° 
15' arifes the bafe ordinance from the vifible 
conjunflion — — — — — 
Which arch is run over by Mercury in — . — 
But 13 fidereal years exceed fo many Julian ones with 
3 intercalations by — — — — 
Thereibre Mercury returns to the fun after 1 5 Ju- 7 
lian years, and befides •— — — 3 
Or, with four intercalations, if theprecceding year? 
be the third after Siffc-^tik — -r- S ^ 
d. h. 
m. 
17 34 
Bui 
