150 
December 8, 1845. 
SIR Wn. R. HAMILTON, LL.D., President, in the 
Chair. 
The President made a communication on some new appli- 
cations of Quaternions.—See Appendix, No. V. 
DONATIONS. 
Registrum Prioratus Omnium Sanctorum juxta Dublin. 
Edited, for the Irish Archeological Society, by the Rev. 
Richard Butler. Presented by the Society. 
Transactions of the Institution of Civil Engineers of Ire- 
land. Vol. 1. Presented by the Secretary, Thomas Old- 
ham, Esq. 
Memoires de Academie Imperiale des Sciences de St. 
Petersbourg. 6me serie, viz.: Science Naturelles. ‘Tome 
IVme, 6me Livraison. Divers Savans. Tome IVme, 6me 
Livraison. Recueil des Actes de la Seance Publique del Aca- 
demie Imperiale des Sciences de St. Petersbourg; tenue le 29 
Dec. 1844; et Science Politique. Tome V., Livr. 5. Pre- 
sented by the Academy. 
Memorie de la Reale Academia delle Scienze di Torino. 
Tome XX XIX. (1836). Presented by the Academy. 
Proceedings of the Geological Society of London. Vol. 1V. 
Part 3, No. 104. Presented by the Society. 
Flora Batava. Nos. 137, 138. Presented by the King 
of Holland. 
Several Iron Swords, and other Weapons, found near 
Kilmainham. Presented by the Directors of the Great South- 
ern and Western Railroad. 
A large Collection of Iron Swords, Bosses of Shields, 
Spears, and other Weapons, some Fibule made of Bronze and 
Silver, all found in the Cuttings of the Great Southern and 
Western Railroad, near Kilmainham. Presented by Colonel 
Napier, Deputy Adjutant-General. 
