CONTENTS. 



Page 

 On the Employment of Notation in Chemistry. By the Rev. W. 



WHEWELL, Professor of Mineralogy in the University of Cam- 

 bridge V '' . . . . . . .437 



On the Plant intended by the Shamrock of Ireland. By I. E. 

 BICHENO, Esq., F.R.S., Sec. L. S., &c. [Read at the Linnean 

 Society.] . . . . . . . 453 



On the Earliest Epoch of Egyptian Chronology. [In a Letter from 

 PROFESSOR RENWICK to CAPTAIN SABINE] . . . 458 



An Account of a Remarkable Instance of Anomalous Structure in 

 the Trunk of an Exogenous Tree. By JOHN LINDLBY, Esq., 

 F.R.S., &c., Professor of Botany in the University of London . 476 



On the First Invention of Telescopes, &c. By Dr. G. MOLL, of 

 Utrecht (concluded) . . \ e " & " ***.*" . .483 



On the Contrivances of some Animals to secure Warmth. By 

 J. RENNIE, A.M., A.L.S., Professor of Natural History, King's 

 College, London . . rfi ^o i >^B! w.n-.>. ->it0 * . 496 



On the Aurora Borealis of the 7th of January, 1831. By Dr. MOLL, 

 of Utrecht . "v * . . . . .519 



Observations on the Aurora Borealis of the 7th of January, the llth 

 of January, and the 7th of March, 1 83 1 . By the Hon. CHARLES 

 HARRIS ........ 522 



On the Height above the Surface of the Earth of a Luminous Arch 

 of the Aurora Borealis, on the 7th of January, 1831. ByS. 

 H. CHRISTIE, Esq., M.A., F.R.S., &c. . . . .525 



On Elaterium ; and a New Principle obtained from it by Analysis. 

 By HENRY HENNELL, F.R.S., M.R.I., Chemical Operator, 

 Apothecaries' Hall /;. . . ^ * .) . . 532 



Contributions to the Physiology of Vision. No. II. . . 534 



On the Ripple-Marks and Tracks of certain Animals in the Forest 

 Marble. By G. POULETT SCROPE, Esq., F.R.S., F.G.S., &c. . 538 



