CONTENTS. 



NUMBER LX.— DECEMBER. 



Page 

 Prof. Whewell on Isomorphism ; in Reply to Mr. Brooke .... 401 

 Unequal Refrangibility of Light on the undulatory Theory . . 412 

 Rev. R. Murphy on the Symmetrical Functions of a specified 



Number of the Roots of an Equation 413 



Mr. A. H. Haworth's Decas tridecima Novarum Plantarum Suc- 



culentarum 414 



Mr. H. J. Brooke's additional Remarks on Isomorphism 424 



New Books : — Dr. Paris's Life of Sir Humphry Davy 426 



Mr. Rennie's Edition of Montagu's Ornithological Dictionary 



{^continued) 429 



Proceedings of the Geological Society 433 



■ . Linnsean Society 437 



Astronomical Society 442 



Zoological Society 447 



On Mudarine 465 



M. Serullas on the Preparation of Oxichlorate of Potash — 



Separation of Antimony and Tin 467 



White's Ephemeris — Mr. Johnstone on Vanadium — New 



Patents 468 



Occultations of Planets and Fixed Stars by the Moon, in 

 December 1831. Computed for Greenwich, by T. Hender- 

 son, Esq. ; and circulated by the Astronomical Society — 



Meteorological Observations 470 



General analytical Index to the First Ten Volumes 

 of the New Series. 



