134) Royal Astronomical Society. 



M.T. Pulkowa. R.A. Dec. 



1846 Nov. 4 17 58 49 193 55 28-4 —3 14 227 



13 18 4 11 198 12 42-8 —4 47 41-6 



These positions are free from parallax. The resulting corrections 

 for M. D'Arrest's ephemeris are, — 



R.A. Dec. 



1846 Nov. 4 -17-5 +6 39-3 



13 —1 8-1 +0 37-1" 



Mr. Lassell forwarded a more complete account of his physical 

 observations on Le Verrier's planet, with his Newtonian reflector, 

 2-feet aperture, mounted equatoreally : — 



Oct. 3. He received an impression of a ring, not much open, and 

 nearly at right angles to the parallel of daily motion. Speculum A 

 and plane metallic reflector. 



Oct. 10. The same impression of a ring in the same direction. A 

 minute star just steadily visible, with full aperture of 24 inches, 

 powers 316 to 567, distance 2| to 3 diameters, a little to the right, 

 and apparently helow the ring continued. Speculum B and Merz's 

 prism. 



Nov. 10. The planet very like Saturn, as seen with a small tele- 

 scope and low power, but much fainter. Same speculum and prism 

 as before. 



Nov. 11. The planet still retains its appearance. A faint point 

 of light considerably distant, in the direction of the ring and below 

 it. Speculum A and plane reflector. 



On these nights several persons saw the supposed ring, and all in 

 the same direction, as shown by independent diagrams. 



Nov. 30. A minute star above, and a little to the left of the con- 

 tinuation of the ring, distance 2 diameters. Speculum B and Merz's 

 prism. 



Dec. 3. The same relative appearance exactly of planet and small 

 star as on October 10th. The direction of the ring estimated at 

 about 70° with the parallel of daily motion. The small star about 

 3 diameters distant and 50° N. following. Telescope as before. 



Dec. 4. No minute star visible, though carefully looked for. Te- 

 lescope as before. 



Mr. Lassell says that the points of light seen on Oct. 10, Nov. 30, 

 and Dec. 3, were, so far as he could judge, the same in appearance 

 and brightness. There were no other stars in the immediate neigh- 

 bourhood. Hence he conceives the probability is in favour of the 

 star being a satellite. 



With respect to the ring, Mr. Lassell says that " he has never 

 looked at the planet, under tolerable circumstances, without receiving 

 the same impression of its existence ; " and that so far as he can 

 judge, the direction of the supposed ring makes a constant angle 

 with the meridian, and not with the horizon ; but this is not very 

 certain. 



In speaking of the quality of his telescope, Mr. Lassell says that 

 he finds Merz's prism gives him more light than a plane reflector, 



