394 Nen) Publications, 



evident that if really a comet, it is one of first-rate magnitude ; and 

 if it be not one, it is some phenomenon beyond the earth's atmo- 

 sphere of a nature even yet more remarkable. 



I have the honour to be, Sir, 



Your obedient servant, 



J. F. W. Herschel. 



CoLLiNGWooD, March \9th. 



P.S. Had there been any post last night, this communication 

 would have been made a day earlier. 



8 P.M., March 19. — The tail of the comet, for such it must now 

 assuredly be, is again visible, though much obscured by haze, and 

 holding very nearly the same position ! 



NEW PUBLICATIONS. 



The following publications have been received : — 



1. Essai sur les Glaciers et sur le terrain Erratique du Basin du 

 Rhone, par Jean de Charpentler. One volume 8vo, pp. 363. With 

 Maps and Plates. 1841. From the Author. This valuable work is already 

 well hiown in Britain, through the medium of thin Journal and the writingi 

 of our geologists. 



2. The Year-Book of Facts in Science and Art, exhibiting the most 

 important discoveries and improvements of the past year. 12mo pp. 

 283. With numerous Engravings. London, Tilt and Bogue. 1843. 

 From the Publishtr. 



3. Travels in Nevr Zealand ; with Contributions to the Geography, 

 Geology, Botany, and Natural History of that country ; by Ernest 

 DieflPenbach, M.D., late Naturalist to the New Zealand Company. In 

 Two volumes Bvo. London, John Murray, Albemarle Street. 1843. 

 From John Murnvj, Esq., Albemarle Street, London. To those nfto wish 

 to become acquainted with this interesting country in a statistical, commercial, 

 and natural-historical point of view, we panicutarly recommend this valuahh 

 iiork. 



