VOL. LX.} 



PHILOSOPHICAL TRANSACTIONS. 



^9 



XXII 1* On the late Transit of Fenm. By Nathanael Pigott, Esq. Dated 

 Caen, Lower Normandy, Feb. Q, 1770. p. 257. 

 To his own observations Mr. P. has added those of other observers, which 

 were sent to him from different places, and reduced them to the observatory of 

 Paris, keeping an account only of the difference of meridians, as inserted in the 

 Connoissance de terns, and omitting the small correction of the parallax, suit- 

 able to the different situations of these places, because the longitude of some of 

 them is not known with sufficient precision, to admit here of this very small 

 equation. '' ^'■■*<-' ' ^^ ■'^' '^< '«'>• 



The place at Kew, where Dr. Bevis observed, being l™ Q* to the west of the 

 observatory at Greenwich, is of course 10"* 25' west of that at Paris. The ob- 

 servations in the table, joined by a brace, were made together in the same place. 

 In comparing the observations of the internal contact, it is seen how little the 

 last five agree with the others. Mr. P. was wholly ignorant in what light the 

 able astronomers, who observed at St. Hubert, consider their obsei"vations. M. 

 le Monnier, in communicating them, adds no remarks on them. As to those 

 made at the house called La Mission, situated in the neighbourhood of Alle- 

 niagne, a village near this town; this house is about 500 toises south-east of 

 Mr. P.'s observatory at Caen, and their difference of meridians about 200 toises. 



At 7^ 4"" 58\5 of the clock, or 7^ Q™ 38\5 apparent time, Mr. P. perceived 

 the external contacts of the sun's and Venus's limbs. As the impression on the 

 sun's limb seemed considerable, he concluded this observation too late, which he 



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