54. ASTRONOMICAL anD 
Mr. Caffini, fen. 1^ 10' 28" # 
Mica, 1 10 152 I 12 105 
Hence it appears, that at the egrefs, Mercury was about r’ 
57” in making his tranfit acrofs the fun's limb, the half of 
which, viz. 58%‘, added to the time of the fecond internal - 
contact, will give 1™ 11/12”, P. M. for the time of the cen- 
tral contact, at the egrefs ; and, fubtracted from the time of 
the firft internal conta&, will give the central contact at the 
ingrefs 8" 39’ 383”, A. M. 
N. B. The place where Mr. Caffini, fen. obferved is 6” 
in time eaft of the meridian of the Royal Obfervatory ; the 
place where Mr. le Monnier, jun. obferved, 2” weft. The 
times obferved by them are here adjufted to the meridian of the — 
Obfervatory. The place where the Abbe de la Caille made his — " 
obíervations is fo near to the meridian of the Royal Obfervatory, a 
` that the difference in time is imperceptible. 
At 9h. 39381, ` A.M. apparent time, at the Royal Obfervatory Be 
of Paris, P 
The fun’s longitude, g5 13°42! 59" 20M | E 
Mercury's geocentric ecliptic Jongitude, 7 12 45 55 688 — 
Mercury's geocentric lat. fouth decreafing, . 10 48, 165 
The fun's right afcenfion, 220 .5.40 . 
The right afcenfion of the mid-heaven, I70 O 2I 
Angle pPZ, 99 59 es 
* Me Caffini, fen. was doubtful of the fecond external contact ; it is rere on 
omi a 
