VOL. XXV.] PHILOSOPHICAL TRANSACTIONS. 297 



well defined, within the whiteness; which encompassed it about, the colour of 

 which was like that of a white crown, or halo, of about 4 or 5 degrees in dia- 

 meter, which accompanied it, and had the moon for its centre. The planet 

 Venus was seen at the same time, at some distance, without that crown, between 

 the east and n. e. in respect of the sun. Saturn and Mercury were also seen 

 by many, eastward from the sun's place. And had the sky been clear, many 

 more stars might have been seen, and with them the planets Jupiter and Mars ; 

 that towards the east, and this toward the west: so that the seven planets might 

 have been seen, almost all at once. Accordingly some persons in the country 

 saw more than l6 stars; and many people, on the neighbouring mountains, 

 saw the sky starry, in some places, where it was not overcast, as during the 

 night in the time of the full moon. 



The total immersion began about 3 quarters past 9. The duration of the 

 total darkness was precisely 3 minutes, or 180 seconds, to the moment that the 

 first ray of the sun began to appear again, with much brightness. And this 

 time was observed with a simple pendulum; which was afterwards compared 

 with a pendulum clock, showing the seconds, and regulated by the sun's mean 

 motion. A little after the sun had begun to appear again, the whiteness and 

 the crown, which encompassed the moon, entirely vanished. The sun then 

 showed itself more and more; appearing at first like a small crescent, which 

 gradually increased; and whose concave side seemed terminated, as by an arch 

 described with the compasses. A little before the total obscuration, the country 

 on the west side already seemed overcast with darkness; and after the total 

 obscuration, the darkness was seen to leave us gradually, and to fly eastward. 

 According to Mr. Professor Gautier's observations, the time from the first 

 emersion of the sun, to the end of the eclipse, was just ih. 9m. 30s. 



According to observations of the same eclipse made at Marseilles, in the 

 Observatory of the Jesuits of St. Croix; by Monsieur Chazelles, Engineer of 

 the Galleys, and by Father Laval, Jesuit, Royal Professor of Hydrography. 



The eclipse began at 8h. 28m. 40s.; it reached the sun's centre at 9h. 6m. 

 lis.; it was total at 9h. 34m. 15s. ; the sun began to appear again at 9h. 37m. 

 9s.; the eclipse came again to the centre at lOh. 12m. 23s.; it entirely ended 

 at lOh. 47m. 50s. Three stars were distinctly seen; and during three minutes 

 it was not possible to read. And there remained one bright digit, all about 

 the globe of the moon. 



The manor house of Duillier is in the latitude of 46** 24', and longitude 

 4° 13' 45'^ to the eastward of the Royal Observatory at Paris. And St. Peter's 

 church at Geneva is in latitude, 0** 12' to the southward, and in longitude, 

 0° 5' 1" to the westward of Duillier. 



VOL. V. Q Q 



