[ 287 ] 



LII. Notice of some recent Observatiojis of Encke'sCo7net, and 

 of Gambart's Comet of Julij 19; — extracted from a Letter 

 from Professor Schumacher of Altona^ to the Rev. T. J. 

 Hussey*. 



"C^NCKE'S comet has been but twice observed this year (at 

 -"-^ least I have received no more observations), and that not 

 in Europe, but by M. Mossotti at Buenos Ayres. It was un- 

 commonly faint, and even there scarcely visible. 



Of the comet discovered July 19 by M. Gambart, one of 

 my assistants, Mr. Peters, has calculated the following ele- 

 ments, which he is now about to correct by the lahole of the 

 observations. They are founded upon Gambart's observations, 

 July 19 ; our own here, August 4; and Nicolai's, August 21. 



Passage . . 1832. Sept. 25-62887 mean Berlin time. 



Perihelion . . 227° 50' 2" 1 counted from the apparent 



S 72 28 16 j Equ™ July 29. 



i 43 20 20 



log 3' 0-0728427 



Retrograde. 

 They represent the observations as follows : 



Diff. in Long. in Latit. 

 July 19, Marseilles —4" — I'' 

 August 4, Altona +1 +11 

 21, Manheim +2 +1 



Altona, Sept. 3, 1832. 



LI 1 1. On Periodical Variations in the Qjiantities of Water af- 

 forded by Springs; — in a Letter to Sir Charles Lemon, Bart. 

 M.P. F.R.S. By W. J. Henavood, Deputy Assay-Master 

 of the Duchy of Corn'wall, F.G.S. Hon. M.Y. P.S. 



To the Editors of the Philosophical Magazine and Journal. 



Gentlemen, 



''■"'HE only publications pretending to bring this subject to 

 ■*■ numerical accuracy, with which I am acquainted, are 

 Mr. Bland'sf and my own|. The information contained in 

 both these, is of a very similar character; but I will now en- 



• Communicated by Mr. Hussey. 



t Phil. Mag. and Annals, N.S. vol. xi. p. 88: Read to the Geological 

 Society, December 14th, 1831. 



X Phil. Mag. and Annals, N.S. vol. ix. p. 170. Read to the Royal So- 

 ciety some time in February or March 18.30. A typographical error, dates 

 this in the Phil. Mag. .January 28th, 1831, instead of January 28th, 1830, 

 which it should have been. 



