“I have seen with great pleasure, in the transactions of your Philosophical Society, the annular eclipse of 1791:[292] I have calculated the conjunction 7^h 42′ 19″; but I have been obliged to take one minute from the phases of the ring, and to suppose {6^h 49′ 30″} / {6^h 53′ 47″}, in order to agree, either with your end of the eclipse, or the difference of meridians, already known with sufficient accuracy by the transit of Venus, which gives 9^h 10′ 6″; and your eclipse gives, 9^h 10′ 3″, or 5^h 0′ 43″ in relation to Greenwich. “What has given me still greater pleasure, is, that the duration of the ring, as you observed it, agrees very well with the diameters of the Sun and of the Moon, which T have adopted in the third edition of my _Astronomy_ (1792), and the diminutions that I there propose for eclipses; viz. 3″½ to be taken from the diameter of the Sun, and 2″ from that of the Moon.[293] “I pray you to make many compliments for me, to the astronomers whom I know, in your country, Mr. Willard at Beverley and Mr. Williams at Cambridge: Is there any other astronomer, now, who applies himself seriously to astronomy? I greet you with health and brotherhood. “LALANDE. “Professor of Astronomy, and Inspector of the College of France,[294] Cambray Place.“ ----- Footnote 292: The continuation of the 6th volume of the American Philosophical Transactions (published in 1809) contains various observations on the Annular Eclipse of the 3d of April, 1791, made at Greenwich, Paris, Cambridge in New-England, Philadelphia, and George-Town in Maryland. A recapitulation of the results of the longitudes of Philadelphia and Cambridge, west from Paris, is made from the Transit of Venus, in 1769; the Transits of Mercury, in 1782 and 1789; this Annular Eclipse of the Sun, in 1791, and a Solar Eclipse, in 1806; the mean results of which, give The Long. of Philadelphia, W. from Paris, 5^h 10′. 01″,2 Do. of Cambridge, Do. 4. 53. 53 These observations were communicated to the Philosophical Society by Don Joseph J. Ferrer, of Cadiz, a very respectable astronomer, and a foreign member of the Am. Philos. Society. Footnote 293: