MATHEMATICAL PAPER S. i55 
! mm 10h 92/417 — 10h 6/229 ^ - 
Duration of the tranfit, = 695 |. internal 1 ro 38 ext. 1.23 3f ^ 
The ftate of the atmofphere was unfavourable, during the 
tranfit. The limb of the fun appeared ferrated ; fo that it was 
difficult to determine the contacts, with that precifion which 
could be wifhed. 
At the time of the firft interna] contact, and for fome add 
nutes after, the limb of ¥, next to the fun's eaftern limb, had 
an oval. appearance ; and his. limb, next. to the weftern limb of 
the fun, put on the fame appearance, a few minutes before, and 
at the time of the fecond internal contact. | ist 
For $'s horizontal parallax.. 
g s diftance from the earth 67681 : the fun’s aie dim 
the earth 98879 :: the fun's horizontal parallax 8", 55: 4's. 
horizontal parallax 12'*, 49... Therefore; &'s aini pre 
lax from the fun is. 3^ 94. 
Elements for calculating $'s parallax from the’ fun in’ latitude. 
and longitude, at Caméridge; at thé: firft external contact; 
November 12;. 1782, .at. iet 6' 27'’,, A.M. apparent times. 
The fun’s-longitude,* |. - | 555 20?231.53 5504. 
Mercury's geocentric icine, ; 57: 20:3 F207: 
Mercury's geocentric latitude, north; s |. 19e 551754. 
The fun’s right afcenfions. | ot, 227 S9 1& ami 
The right afcenfion, of. the mid-heaven;! .-.-199: 33: pe ena 
Angle anfwering to pPZ.i in. Plate I. Fig. E 70 26.10: 
LJ 
The fun's horary motion, TER N) 
Mercury’s geo. hor. mot. ndeng,intbsecligtiareim. 23 12. 
Mercusy's 
* The. elements of the fun’ are calculated from Mayes, and thofe of Merctry. 
from M, de la Lande’s tables. 
