Ti CONTENTS. 



Report of the Committee of Antiquities, relative to an ancient Tomb 

 discovered in the Phcenix Park page 186 



On the Action of Arseniuretted Hydrogen on Sulphate of Copper, 

 and on the Manganese Alumn analyzed by Dr. Apjohn. By 

 Robert Kane, M.D 193 



On Etruscan Hand Mirrors. By Sir William Betham. . . . 194 



On the ancient Tomb recently discovered in the Tumulus in the 

 Phcenix Park. By Sir William Betham 196 



On the Fifth Eugubian Table. By Sir William Betham. ... 200 



Remarks on the " Antiquitates Americana?." By George Downes, Esq. 202 



On the Specific Heats of the Gases. By James Apjohn, M.D. . 206 



On the ruined Abbeys in the Province of Connaught. By the Rev. 

 Caesar Otway 210 



On the Cross and Breastplate of Cong. By Sir. William Betham. 211 



Address of the President 212 



1838—1839. 



On the Theory of the Ethers. By Robert J. Kane, M.D. ... 223 



On the Laws of Crystalline Reflexion. By M. Neumann of Konigs- 

 berg, with Remarks by James Mac Cullagh, LL.D 229 



Extract of a Letter from Professor Rafn of Copenhagen, to George 

 Downes, Esq 234 



On the Cydippe Pomiformis, and Notice of a Bolina, found on the 

 Irish Coast. By Robert Patterson, Esq 237 



On the Longitude of the Armagh Observatory. By the Rev. 

 Thomas R. Robinson, D.D 238 



On the Structure of English Verse. By the Rev. William Bruce, 

 D.D 241 



Researches on the Dynamics of Light. By Sir William R. Hamilton, 

 A.M 245, 267 



On a Survey and Map of the County of Mayo. By William Bald, 

 Esq., C.E 245 



Notice of a Tumulus, near Rush, County of Dublin. By Lieute- 

 nant Newenham, R.N 247 



Notice of a singular Appearance of the Clouds, observed on the 

 16th December, 1838. By Sir William R. Hamilton, A.M. . 249 



On the Remains of Oxen found in the Bogs of Ireland. By Robert 

 Ball, Esq 253 



On a Substance confounded with White Precipitate. By Robert J. 

 Kane, M.D 254 



Notice of the Aurora of the 19th January, 1839. By the Rev. H. 



Lloyd, Thomas Bergin, Esq., and James Apjohn, M.D. 254, 258, 259 

 Extracts of Letters from Professor Rafn to George Downes, Esq. . 260 

 On the Models of Achil and Clare Islands, and of the S. W. Dis- 

 trict of Mayo, &c. By William Bald, Esq 263 



