CONTENTS. Vli 



PAGE. 



On the formation of Wood in Plants. By David Moore, Esq. . . 187 



On a Thunder-shower observed at Markree Castle, on June 30, 1851. 

 By Edward J. Cooper, Esq 196 



On the same. By the Rev. Thomas R. Robinson, D. D 197 



On the Solar Eclipse in August, 1851. By the Rev. Thomas R. 

 Robinson, D. D 198 



On a Meteoric Phenomenon, similar to an Aurora Borealis. Bv 



Digby Pilot Starkey, Esq 198 



On the same. By the Rev. T. R. Robinson, D. D 198 



On ancient Coins found in Ireland. By George Petrie, LL. D. . 199 



On the same. By the Earl of Enniskillen 200 



The Address of the President in the presentation of the Cunningham 

 Medal to the Rev. John H. Jellett 200 



On Dalton's Theory of Mixed Gases. By Joseph Patton, Esq., of 

 Bombay 203 



On an ancient Bell, said to have belonged to St. Murus. By John 

 Bell, Esq. 206 



On certain Antiquities recently discovered in the Lake of Cloon- 

 free, Co. Roscommon. By Denis H. Kelly, Esq 208 



On the Discovery of the Bones of Fossil Elk. By Robert Ball, 

 LL. D 214 



On Crannoge Islands. By George Petrie, LL. D 214 



On the same. By the Earl of Enniskillen 214 



On the Connexion of Quaternions with Continued Fractions and 



Quadratic Equations. By Sir William R. Hamilton, LL. D. 219, 299 

 On an Aurora visible in Dublin on the Night of October 2nd, 1851. 



By Rev. Samuel Haughton 222 



On a MS. in the Library of Cambray. By Charles P. Mac Donnell, 

 Esq 222 



On the Whirlwind which passed over Limerick, October 5th, 1851. 

 By Daniel Griffin, M. D 225 



On the same. By the Rev. Humphrey Lloyd, D. D., and Robert 

 Mallet, Esq 230 



On an ancient Deed, being a Grant of Land in Islay, from Donald 

 Mac Donald, Lord of the Isles. By the Rev. W. Reeves, D. D. 230 



On Inscribed Crosses on Stones, along with Ogham Inscrip- 

 tions. By the Rev. Charles Graves, D. D 234 



On the British Association's Catalogue of recorded Earthquakes. By 

 Robert Mallet, Esq 235 



On the Homology of Organs and the Affinities of the Polvzoa and 

 Tunicata. By Professor Allman "... 237 



On several Collections of Antiquities made by the Officers of the 

 Board of Works, and presented to the Academy. (See also Ap- 

 pendix No. II.) By W. T. Mulvany, Esq 239, 243 



On the Affinity of Hebrew to the Celtic Dialects. By the Rev. 

 Francis Crawford 247 



