MATHEMATICAL PAPERS. s 
Mercury's parallax in latitude from the fun, 03/4647 
© XV as before, MAT 9 
Mercury's vifible lat. from the fan's center ==E y 417, 82t 
The vifible diff. of long. of o'sand y’s centers = @E 877» 284 
= 14 "37, 284 
Mercarys. s true ecliptic long by geraten, 7^ 12* 249, 41, $57 
Hence it vds: that Mercury's motion in geocentric igi 
gitude in the ecliptic, by obfervation, from his central contact 
at the ingrefs, to his central contact in the egrefs, was 15' 14”, 
787. According to the horary motion in. the elements, from 
whence the calculations were made, it was 15 14", 779. We 
may therefore take the motion given in the elements, as the 
` true, aye e on 82 Probi aid 82i irit horary moti- 
; | $2 T © ‘ude of o s; 
8’s centers at the. central contact at e uie a. 7 tu = 2 
2 19%. This added to 8 39’ 382”, the time of Mercury’ 5 
central contact at the ingrefs, will give 10% 41* 572 A. M. 
Ta emi E the truc ee te aigue hs ghicappe- 
wg H 
. fei Wino, petris venditor seine o 
June, 1763, and din vol. LIX, of the Philofophical Tranfa@ions, commu- 
“Bicates his obfervations of this tranfit, with the exprefs defign of fettling the longi- 
tude of Cambridge, by comparing them with the European ones ; and he gives it 
‘opinion, that it might thereby be determined with more exaéinefs,. than by 
any déervatit tae had been sade ufe of, for that purpofe. 
AXES E T 3 
Qu oum 
