: as ASTRONOMICAL. ax» 
from thefe obfervations it will be eafy to compute all the 
circumftances of this tranfit, and the principal elements of the 
thepry of Mercury. 
Thus, Plate I. Fig. IX. let the rae, AQ. reprefent the 
fun; NS the ecliptic ; ABQ a parallel to the equator ; VA 
the: apparent path of Mercury ; NE part of Mercury's orbit. 
SA; isa perpendicular to the equator ; SE +a perpendicular to. 
the ecliptic ; ; and SM a perpendicular to. Mercury's vifible way. 
iddle of the tranfit will be when. Mercury arrives at the: 
ntM; the ecliptical conjunétion:at E; ; and the conjunction 
in right afcenfion at A: And N p pues the ` d m of 
Magy s afcending node.. 
Sae: ge of the tranfit is given i: the cherie OF: the 
f 
ns sof the ien coitas, was at I we 39s 
ts, dA o 47-3 NT 
E: in right af 
cin, Tay de. Ess from Mr. Paine’ s CT e of 
) er eid &c. The refult of thefe obfervations, as sI 
ced them i $ 
from cslcianion. aréa 
ence — z n mO eA A 
A, of " ‘in Parts of à. "T Time of ra 
wu EX EDS 
"x 
