154 Intelligence and Miscellaneous Articles. 



NEW SCIENTIFIC BOOKS. 



Just Published. 



Account of the " Traite sur le Flux et Reflux de la Mer," of 

 Daniel Bernouilli ; and a treatise on the Attraction of Ellipsoids. 

 By J. W. Lubbock, Esq. F.R.S. 



In the Press. 



A Geological Manual 3 by H.T. De la Beche, F.R.S. &c. In one 

 volume, with numerous wood-cuts. 



The Utility of the Knowledge of Nature considered j with refe- 

 rence to the Introduction of Instruction in the Physical Sciences, 

 into the General Education of Youth : comprising, with many addi- 

 tions, the details of a Public Lecture on that subject, delivered at 

 Hazelwood School, near Birmingham, on the 26th of October, 

 1830. By E. W. Brayley, jun. A.L.S., Lecturer on Natural Philo- 

 sophy and Natural History, and Teacher of the Physical Sciences in 

 Hazelwood School. 



Preparing for Publication. 



Mr. MacCulloch, Professor of Political Economy in the University 

 of London, is preparing for publication, a Theoretical and Practical 

 Dictionary of Commerce and Commercial Navigation. In one large 

 volume, 8vo, with Maps, &c. 



THE COMET. 



Extracts of Communications from Mr. Herapath and Sir J. South 

 to the Editor of The Times, Jan. C 25th, <28th, and 29th. 



On the 7th, at 6 h 30 m A. M., it was in 264 1 1 ' right ascension, and 

 12 33' south declination, from my observation. On the 9th, at 6 h 47 m 

 A. M, it had 261 59' right ascension, and 12 1' south declination, by 

 the observation at Kensington Observatory ; and on the 18th I found 

 it in 252 18' right ascension, and 9 2' south declination,, at 5 h 43 m 

 A. M. The time was apparent or solar in each case. On the 7th the 

 head was white and brilliant, with a tail of between 1 and 2 at Cran- 

 ford, and the comet equalled, as I conceived, stars of the second mag- 

 nitude. To Sir James South, on the 9th, the head was very luminous, 

 and the tail about 1 long ; while to Mr. J. T., near Liverpool, on the 

 12th, the tail seemed 2, or, as he informs me by letter, probably 3 

 long, the head being bright and the nucleus well defined. On the 

 18th the head appeared to me much less and more confused j but the 

 tail had extended in length to full 3, and was much more apparent. 

 At these several epochs it was about 25, 29, and 47 distant from 

 the sun. 



From all these circumstances, it appears that the apparent motion 

 of the comet is retrograde j that it crossed the ecliptic about the lat- 

 ter part of Capricorn, and is proceeding by a path rather concave 

 towards the north, between r the stars and S Ophiuchi, passing to the 

 north of the former, and about 2 to the south of the latter, which it 

 will reach on the 28th inst. ; that its apparent motion is decreasing, 

 and will probably before long cease, and at length become direct j 

 that the comet has approached nearer to the sun, and most likely to 



the 



