VOL. LVI.3 PHILOSOPHICAL TRANSACTIONS. 347 



XXX. A Catalogue of the Fifty Plants from Chelsea Garden, presented to the 

 Royal Society by the Company of Apothecaries, for the Year 1/65, pursuant 

 to the Direction of Sir Hans Sloane, Bart. p. 259. 



This is the 44 th presentation of this kind, completing the catalogue to the 

 number of 2200 different plants. i 



XXXI. Observations on the Eclipse of the Sun of Augmt 5, 1766, made at 

 Colombes, the Observatory of the Marquis of Courtenvaux, 204." East of the 

 Royal Observatory at Paris, and in Lat. 48° 53' 28*. By M. Messier, 

 F. R. S., ^c. From the French, p. 259- 



This eclipse began at 5^ 43" 50' true time, as observed by M. Messier; but 

 at 3-i-' later as observed by M. Jeaurat. The end was not seen. 



XXXl I. Observations of the Eclipses of the Sun of Aug. 16, 1765, and of 

 Aug. 5, 1766, made at Calais. By the Prince de Croy. From the French. 

 p. 26a. 



1. Observation of the Eclipse of the Sun, of the l6th of August 1765, at Ca- 

 lais, near the Steeple. 



Beginning S*" 50™ 46' 



End 5 8 J7i 



The duration, of which I am very certain 1 17 31-j- 

 The greatest magnitude was of 2° 50'. 



There appeared hardly any sign of an atmosphere, except against the cusps of 

 the sun, which seemed something larger at the two sides which touched the 

 moon. There is no indication of one any where else, unless that the disk, seems 

 not so well defined at the ingress and egress. These two remarks would induce 

 me to believe there is a small atmosphere. 



He saw very distinctly with the reflector of 4 feet 3 inches (which answers a 

 common telescope of 70 or 80 feet) and with the acromatic telescope, several 

 mountains, and particularly 5, besides some inequalities. He always saw them 

 in their fixed places, whatever motion was given to the telescope. These seemed 

 to have their summits at about an equal distance from each other. The first 3 

 seemed to have hollows between them, which penetrate a little into the moon; 

 all the rest projected out of the disk. 



On mature consideration, he thinks the moon's atmosphere perceptible. 1, 

 Because the two small elevations, which he constantly saw of the sun's limb, to- 

 wards the cusps, was easily distinguished in the large telescope, through which 

 the other parts appeared very exactly defined. It is true that the sun appears 

 equally bright at the place of this small elevation, but the atmosphere cannot 

 afifect its brightness, and can only somewhat raise the rays, which pervade or slide 



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