XII 



rent new Polarity in Light.' By George B. Airy, Esq. M.A. F.R.S. 



Astronomer Ro^'al page 247 



Description of a Percussion Shell to explode at the bottom of the Sea. 

 By Captain J. Norton 248 



Memorandum addressed to the Royal Society. By T. Wharton Jones, 

 F.R.S 248 



Description of the Electro-magnetic Clock. By C. Wheatstone, Esq. 

 F.R.S 249 



A Memorandum, addressed to the Royal Society, November 28th, 

 1840. By Martin Barry, M.D. F.R.S. L. and Ed 2/9 



Supplementary Note to a Paper, entitled ' Researches in Embryology. 

 Third Series. A Contribution to the Physiology of Cells.' By 

 Martin Barry, M.D. F.R.S. L. and Ed 2/9 



Present state of the Diamond Mines of Golconda. By T. J. Newbold, 

 Esq. of the Madras Array, A.D.C. to Major-General Wilson, K.B. 280 



Magnetic-term Observations made at Milan. By Professor Carlini, 

 Director of the Observatory at that place : also Magnetic-term 

 Observations made at Prague. By Professor Kreil, Director of the 

 Observatory at that place 280 



On the Production of Heat by Voltaic Electricity By J. P. Joule, 

 Esq 280 



1841. 



Variation of the Magnetic Declination, Horizontal Intensity, and In- 

 clination observed at Milan on the 23rd and 24th December 1840... 282 



On the Chorda dorsalis. By Martin Barry, M.D. F.R.SS. L. andE.. 282 

 On the Corpuscles of the Blood. — Part [II. By Martin Barry, M.D. 

 F.R.SS. L. and E 283 



On the action of certain Inorganic Compounds when introduced di- 

 rectly into the Blood. By James Blake, Esq. M.R.C.S 285 



On some Electro-Nitrogurets. Bv William Robert Grove, Esq. M.A. 



F.R.S ' 286 



Contributions to Terrestrial Magnetism. — No. 2. By Major Edward 



Sabine, R.A. V.P.R.S 28/ 



On the Calculation of Attractions, and the Figure of the Earth. By 



C. J. Hargreave, B.A. of University College 289 



Memoir on a portion of the Lower Jaw of an Iguanodon, and other 

 Saurian Remains discovered in the strata of Tilgate Forest, in 

 Sussex. By Gideon Algernon Mantell, Esq. LL.D. F.R.S 290 



On a Theorem of Fermat. By Sir John William Lubbock, Bart. 



V.P. andTreas. R.S c 290 



Miscellaneous Observations on the Torpedo. By John Davy, M.D. 



F.R.S 291 



On a remarkable property of the Diamond. By Sir David Brewster, 



K.H. D.C.L. F.R.S. L. V.P.R.S. Ed 291 



On a Cycle of Eighteen Years in the Mean Annual Height of the 

 Barometer in the Climate of London ; and on a Constant Variation 

 of the Barometrical Mean, according to the Moon's Declination. 

 By Luke Howard, Esq. F.R.S 292 



