VIU CONTENTS. 



PAGE. 



general Remarks on the Classification of the Antiquities found in 

 the North and West of Europe. By J. J. A. Worsaae, Esq., of 

 Copenhagen 310, 327 



On Persepolitan Writing. By Rev. Dr. Hincks. . . 315, 344, 359 



On the Date of the MS. called the Book of Armagh. By Rev. 

 Charles Graves 316, 356 



On the Use of distrihutive Signs of Operation, both real and imagi- 

 nary, in the Construction of Systems of Algebra. By the Rev. 

 Charles Graves 325 



A new Method of expressing, in symbolical Language, the Newtonian 

 Law of Attraction, &c. By Sir W. R. Hamilton, LL.D. . . 344 



Professor Madler's Work, Die Centralsonne. Exhibited by Sir 



W. R. Hamilton, LL.D 353 



A Chart of observed Places of Le Verrier's Planet. Exhibited by 



Sir W. R. Hamilton, LL.D ib. 



On the Attraction of Ellipsoids. By James MacCullagh, LL.D. . 367 

 On the Rotation of a Solid Body. By James MacCullagh, LL.D. 370 

 On the supposed Identity of the Agent in the Phenomena of ordi- 

 nary Electricity, voltaic Electricity, Electro-magnetism, Magne- 

 tico-electricity, and Thermo-electricity. By M. Donovan, Esq. 372, 



402, 427, 467 



An Account of a Fragment of an ancient purple MS. of the Gos- 

 pels. ByRev. J. H. Todd, D.D 374 



On the Lines of Curvature on the Surface of the Ellipsoid. By 

 M. Roberts, F. T. C. D 383 



A Theorem relating to the Hyperbolse. By M. Roberts, F. T. C. D. 385 



On the Anatomy of the Elephant. By Robert Harrison, M.D. . ib. 



Letter from E. J. Cooper, Esq., on the Discovery of a new Comet. 399 



On the diurnal Changes of Temperature recorded at the Magneti- 

 cal Observatory of Trinity College. By Rev. H. Lloyd, D. D., 

 President 401 



On a Theorem df Hodographic Isochronism. By Sir W. R. Ha- 

 milton, LL.D 417 



On the Structure of the Fruit and Mechanism of Dehiscence in 

 some of the Hepaticae, &c. On the external Anatomy of C'helu- 

 rus, Phil, &c. By G. J. Allman, M.D 419 



On the Composition of Essential Oil of Laurus Sassafras. By Sir 

 Robert Kane 425 



On the Equation of Surfaces of the second Order. By James Mac 



CuUagh, LL.D 429 



Remarks on the Same. By Rev. Charles Graves 434 



Researches in Thermo-chemistry. By James Apjohn, M. D. . . 435 



An ancient Irish Brooch exhibited, belonging to the Rev. Richard 

 Butler 441 



On certain Properties of the Surfaces of second Degree. By J. K. 

 Ingram, Esq 442 



