The Comet. 63 



M. Gay-Lussac read a Memoir by MM. Boussingault and 

 Rivero on die Milk of the Cow Tree. MM. Humboldt and 

 Arago mentioned that those gentlemen, Professors of Chemis- 

 try at Santa Fe de Bogota, had just sent some interesting ob- 

 servations on the mean height of the barometer at the level 

 of the sea between the tropics ; on its hourly variations ; on 

 the hot springs of the Cordilleras ; on the geographical posi- 

 tions of various places, &c. &c. 



M. Becquerel read a Memoir on the electric Effects deve- 

 loped in various chemical Actions. The Sitting finished by 

 the reading of a Memoir by Mr. H. M. Edwards, on the ele- 

 mentary Structure of the principal organic Tissues of Animals. 



July 14. — Specimens were received from the director-gene- 

 ral of mines of the Sal gem, from the mine lately discovered 

 in Lorraine ; he requested that an analysis of it should be 

 made by a Commission of the Academy ; and stated that the 

 Minister of Finance would publish their Report. 



M. Arago communicated a new Note of M. Becquerel on 

 his electro-magnetic experiments. 



M. Ue Ferussac read a Note on the Shells found m the 

 Nile by M. Caillaud, and which had been erroneously regarded 

 as oysters ; they are heteries of Lamarck. 



M. Gaymard read a Memoir on the Growth of Polypi geo- 

 logically considered. 



M. de Jussieu jun. read a Memoir on the Family ot lui- 

 phorbiaceae. 



XIV. Intelligence and Miscellaneous Articles. 



THE COMET. 



Gosport Observatory, Jan. 2G, 16:24. 



THE following observations on the present comet are at 

 your service, if you think them worth a place in your 

 Journal, and have not received a more satisfactory account 

 from any of your Correspondents. It was first observed here 

 in the morning of the 29th of December, 1828, when its 

 nucleus appeared ill denned, and no larger than a star of the 

 third magnitude, and its train was only 2f degrees long. I be 

 following memoranda will show its position from time to tune, 

 and its progressive antecedental motion under the fixed stars. 



Monday Morning, Dec. 29th, 182:1, its Right Ascension was 251° 15' 



' Z its Declination 8 30 north. 



Sunday Morning, Jan. 4th, 



its Right Ascension was 249 00 



its Declination 18 12 north. 



Monday Morning, Jan. 12th, I , its Right Ascension was 24:? 30 



1 Z M«-». iu Declination 32 50 north. 



Friday Evening, Jan. 23d, its Wight Ascension was 217 20 



its bccHntftion 63 4.> north. 



For 



