466 Royal Academy of Sciences qf Paris. 



the 4th and 3rd with the greatest distinctness. On Jupiter'* 

 approach, no difference of his light or shape was perceptible ; 

 but after the contact had taken place, he appeared to exhibit 

 no deficiency of disc, but presented a complete figure, as if 

 placed between the moon and the earth ; this appearance 

 continuing for a few seconds. When the planet was almost 

 entirely immersed, his retiring limb appeared as though it 

 were considerably elongated, or formed a segment of a much 

 larger circle than had been previously presented. The posi- 

 tion of Mr. Ramage's telescope did not allow him to observe 

 the emersion. 



Captain Ross was prevented by the state of the weather 

 from seeing the immersion, but was fortunate enough to ob- 

 serve the emersion, seeing first, a considerable elongation, 

 which gradually diminished as more of the planet appeared 

 from behind the moon. 



Part of a letter was read from Mr. R. Cornfield, a member 

 of this Society, in reference to the same occultation. He ob- 

 served it at Northampton with a good Newtonian reflector. 

 Mr. Cornfield and two other contemporaneous observers, with 

 good instruments, noticed, that when Jupiter had about half 

 disappeared, there was exhibited an adhesion or protuberance 

 on each side of the planet, which as Jupiter sunk behind the 

 moon, became larger and larger, so that just before the entire 

 disappearance of the planet it exhibited a considerable elon- 

 gation deviating greatly from a circular curve of the same 

 diameter as the planet. 



Phenomena somewhat analogous, expecially in reference 

 to the indentations and adhesions, were noticed by several 

 astronomers, who observed the transit of Venus in 1769. — See 

 the accounts by Captain Cook, Mr. Charles Green, Mr. Charles 

 Mason, M. Pingre, &c. in the Philosophical Transactions for 

 1770 and 1771, which are here adverted to, because the con- 

 sideration of kindred phaenomena may assist in the explication 

 of the whole. 



ROYAL ACADEMY OF SCIENCES OF PARIS. 



July 19. — The Academy continued the examination of the 

 questions addressed to it by the Government, relative to the 

 precautions required in the use of steam-engines. M. Che- 

 vreul read a Memoir on different species of bile, and in parti- 

 cular on the presence of cholesterine in human bile and in 

 that of the bear. 



July 26. — M. Roques proposed to found a prize for the dis- 

 covery 



