Section C. — Archaeology, Linguistic, and Literature— 



1. — On tlie Discovery of an Ancient. Grave, near Ardrahan, County 



Galway. By J. Maeets Robeets, B.A.I. (Dublin). 

 2.— The Irish Guards, 1661-1798. By C. Litton Falkiner, M.A. 

 3. — Scarabs in the Dublin Museum. By Miss M. A. Mxjehat, F.S.A, 



Scot. 

 4. — Notes on an Unpublished MS. Inquisition (a.d. 1258), relating to 



the Dublin City Watercourse. From the Muniments of the Earl 



of Meath. By Henry F. Bekey, M.A. 

 5. — An Arabic Inscription from Ehodesia. By Stakley Lane-Poole, 



M.A., LiTT.D. (Plate I.) 

 6. — Some further Notes on Ancient Horizontal Water-Mills, Native 



and Foreign. By Joseph P. O'Reilly, C.E, (Plates 11. , III, 



and IV.) 

 7. — The Cists, Dolmens, and Pillars, in the Eastern Half of the County 



of Clare ( ISaronies of Bunrattj'). By Thomas Joenson Westkopp, 



M.A. (Plates V. and VI.) 

 8. — The Cists, Dolmens, and Pillars, in the Eastern Half of the County 



of Clare (Baronies of TiiUa). By Thomas Johnson Westkopp, 



M.A. (Plates VII. and VIII). 

 9. — Some Illustrations of the Commercial History of Dublin in the 



Eighteenth Century. By C. Litton Falkinee, M.A. (Plates 



IX. -XII.) 

 10. — The Itinerary of Patrick in Connaught, according to Tirechan. By 



J. B. BiTEY, M.A., LL.D., Litt.D., Regius Professor of Modern 



History in the University of Cambridge. 

 11 . — The Counties of Ireland: An Historical Sketch of their Origin, Con- 

 stitution, and Gradual Delimitation. By C. Litton Falkinee, 



M.A. 

 12. — Notes on the Orientations and certain Architectural Details of the 



Old Churches of Dalkey Town and Dalkey Island. By Joseph 



P. O'Reilly, C.E. (Plates XIII.-XVII.) 



CONTENTS 

 SECTION A. PART 3 



PAGE 



7. — The Geometrical Meaning of Cayley's Formulae of Orthogonal Trans- 

 formation. By C. H. HiNTON, Patent Office, U.S.A., ... 59 



8. — Method of obtaining the Cubic Curve having three given Conies as 



Polar Conies. By J. P. Johnston, Sc.D., 66 



Dublin: Printed at the University Press, by PONSONBY & GIBBS, 

 Printers to the Academy. 



