474 
received preparatory to the cast being made from it. The 
inscription reads as follows :— 
OR DON R15 00 Thurodelbuch u chonchobair. or 
oON Thaer Oo sillu cR u Thuathail. 
“ A PRAYER FOR THE KING, FOR TURLOGH O CONOR. A PRAYER 
FOR THE ARTIFICER, FOR GILLU CHRIST O THUATHAIL.” 
Tn conclusion, Dr. Petrie observed that the importance of 
this latter inscription, as preserving the name of the Irish ar- 
tificer, will be at once apparent,—and that it was fortunate 
that so many remains of art in Ireland, of the eleventh and 
twelfth centuries, preserved similar evidences of their Irish 
manufacture ; as without such evidences, all those who main- 
tained that the Irish were ignorant of such art anterior to the 
arrival of the English (amongst whom the distinguished names 
of Sir James Ware and Sir William Petty are to be numbered) 
would, most probably, assert that they were of foreign origin 
and manufacture,—and it would not be easy to prove the fal- 
lacy of such an assertion. But its fallacy is proved by the in- 
scriptions preserved on the shrine of the Bell of St. Patrick, 
now in the possession of Dr. Todd, and exhibited to the Aca- 
demy this evening,—and by those on the cross of Muireadhach 
O’Dubhthaig, or Murry O’Duffy, the predecessor of Edan 
O’Hoisin in the Archbishopric of Tuam, which is now in the 
Museum of the Academy. Examples of the jewellery art, of 
equal beauty and of equal antiquity with these, were not, as 
far as Dr. Petrie knew, to be found in England ; nor was there 
an example of the ornamented stone cross which could rival 
that of Tuam in the grandeur of its proportions, and the beauty 
of its ornamental sculptures. 
Professor Sir William Rowan Hamilton exhibited the fol- 
lowing Theorem, to which he had been conducted by that 
theory of geometrical syngraphy of which he had lately sub- 
mitted to the Academy a verbal and hitherto unreported 
