Astronomical Society. 221 



A notice of the same comet, from Sir Alexander Johnstone, was 

 communicated by Mr. Baily. It was discovered by Prof. Dabadie, 

 at the Mauritius, on the evening of the 16th of March. It was first 

 seen between the Chameleon and the great nebula. The next day it 

 had advanced about 5 towards the north, and it continued in this 

 direction with a diminished velocity, till it reached the eastern wing 

 of Cygnus, where it disappeared about the end of May. The length 

 of its tail never exceeded 5. Professor Dabadie had no observa- 

 tory; but he made a great number of observations of its distance 

 from several stars, and from three of these he deduced the follow- 

 ing elements. 



Longitude of ascending node = 228 31' 

 Inclination of the orbit = 49 46 



Place of the perihelion =238 13 



Perihelion distance = 0-897 



Passage of the perihelion, April 11, at 2l h 



Motion direct. 



The distances from which these elements are deduced are as 

 follows : 



1830. True time at Port Louis. 



March 19 at 8" 45 m 50 s Comet and Canopus = 36 11' 



920 Comet and a Centauri= 34 50 



April 1 16 48 Comet and a Centauri= 69 34 



17 21 Comet and a Aquilse = 43 50 



April 15 16 25 50 Comet and a Aquilae = 21 50 



40 50 Comet and a Centauri == 97 39| 



III. A letter from Sir Thomas Brisbane, with occultations of 

 fixed stars by the moon, observed at Makerstown, lat. 55 34' 45" N. 

 long.0 h 10 m 4 s W. 



IV. An Account of a private Observatory, recently erected at 

 Bedford, by Capt. W. H. Smyth, R.N. 



Capt. Smyth gives sixty observations of standard stars, for each 

 of which the zenith point was determined by the collimator, and de- 

 duces from the mean of the whole, 



The latitude of the Bedford observatory 52 8' 25"-45 



By eight observations of Polaris, above and below"j 

 pole, face east and face west, instrument ad- >52 8 29 *71 

 justed by the plumb-line and levels J 



Mean 52 8 27-58N 



From six observations of the moon and raoon-culminating stars, 

 half of the first and half of the second limb, and compared with 

 corresponding Greenwich observations, 



The longitude of the Bedford observatory =l m 51 s< 975West. 

 From four corresponding occultations . .*. 1 51*486 

 From thirty-eight non-corresponding ocO 



cultations and eclipses of Jupiter s sa- > 1 47 *948 



tellites J 



Capt. Smyth is inclined to adopt, for the present, l m 5P*7. 



ZOOLOGI- 



