CONTENTS. 
VOLUME III. 
aa 
1845-1847. 
PAGE. 
Tueory of Quaternions. By Sir W. R. Hamilton. . . . 1, 109, 273 
Returns laid on the Table by order of Council. . . RSPR Poe | 
Letter read from Rey. T. R. por, D. D., on a Periodical 
Meteors of 10th August. . . . ; 18 
An Account of two remarkable Halos and Pasian avian in 
May and June last. By Rev. H. Lloyd, D.D. . . . . 18 
On an ancient wooden Table and Dish, oF a in Peat or Turf Bos. 
By Rev. Thomas Porter, D.D. . 21 
On the original Use of certain Golden Gitirtaal ‘Me btitek Arti. 
cles in the Museum of the Banat Irish cians Py, Robert 
Ball, Esq. . . 25 
On Diverging Infinite gates, awit on certain Eee aot stiches 
with. By Professor Young, of Belfast. . . . fo 
On the Subject of Total Reflexion. By Professor hie Cullagh. . 49 
On Algebraic Triplets. By Rev. Charles Graves, A.M. 51, 57, 80, 105 
On ‘“ Dugald Stewart’s Explanation of certain Processes in the 
Human Understanding.” By the Rev. James Wills. . . . . 65 
On two undescribed Alge. By Dr. Allman. . . vit oce En 
On LordRosse’s Telescope. By the Rev. T. R. Bakean, - 68,114 
A Letter read from Charles Bourns, Esq., giving an Account of the 
Excavation made in the Round Tower ‘of Lusk. . 68 
On the Construction and Results obtained with the Six-foot Re- 
flecting Telescope of the Earl of Rosse. (Seep.114). . . . 74 
On the present State of the Ancient cgi Remains of Iona. 
By J. Huband Smith, Esq. . . 76 
On some Geometrical Theorems Lalantee to Blliptie Pinhead By 
Wm. Roberts, Esq., F.T.C.D. . . - - 77 
On the maximum Amount of Resistance namie to sustain : Banks of 
Earth. By John Neville, Esq. . . - 84 
On anew Photogr apie coon’ which he date the Catalysotype 
By Dr. Thomas Woods. . 89 
