164 ASTRONOMICAL OBSERVATIONS. 
Mayer’stables give the limbs feperated 8”,and Mafon’s the 
eclipfe ftill remaining 6”. Therefore Maton’s tables re- 
prefent both the beginning and end of this eclipfe more 
accurately than Mayer’s, but the difference is very little. 
Mr. Mafon has placed the moon’s nodes 51”, more forward, 
but this eclipfe will be better reprefented by retaining the. 
place of the node as given by Mayer. 
Tranfit of Mercury, obferved at Wafhington College 
November 5th, 1789. By the Rev. Dr. Wilham Smith. 
N. B. The clock was cleaned and fet a going P. M. No- 
tember 4th, its rate of going, as to mean time, uncer- 
tain; but at fun rife November sth, as nearly as‘could be 
guefled, it was about 2’. 30” fafter than apparent time. 
External contact, :8%.93's/50'19 A.M. 
Internal oe a ee ie 8) g Magnifying power 95. 
Micrometer meafures of neareft limbs. 
h ‘ Inch. xz6ths. 20ths. scoths. f u 
Q: 19-0. 0:0. 7 1. od saline 
54. = 0. Q- O. — = 7s awh 
FOP ris ee His 50 
stor Oe det tO. oO. ae 
LIU 0 Oe eee Gert Oras Oar giy. 
12. 0— 0. | 5. 0-.. 20 = 4. ae 
Second internal contac 12". 55’. 10 
Total egrefs yay Shae Hn ing power 330. 
h ! faa Toths. 20ths f 4 
©’s diameteriati 12.150 3) 6 . I)= = 32 14,5 
Annular Eclipfe of the Sun, April 3d, 1791. Obferved 
at Philadelphia, by D. Rittenhou/e. 
Beginning (fun juft above the horizon) > 
about - - Sa Sao Lr 
Ring formed nearly, at 6. 50. 30 pA.M. 
The ring broken 6. 54. 47 | Mean time, 
End of the eclipfe, uth Fen oe Tea 
At the middle of the eclipfe the ring was nearly twice 
as broad at the fouth fideas at the north fide, 
N°, 
