328 Royal Irish Academy. 



" On the Manufacture of a Gold Fibula purchased for the Museum of 



the Eoyal Irish Academy." Notes communicated by Edmund 



Johnson, and W. Prazer, f.r.c.s.i. 

 '• On a Cist and Urns found at Greenhills, Tallaght, County Dublin." 



By Lieutenant-Colonel G. T. Plunkett, k.e., Director of the 



Dublin Museum of Art and Science. 

 "Notes on the Lesser Castles or 'Peel Towers' of the County Clare." 



By T. J. Westropp, m.a. 

 " Astatics and Quaternion Functions." By Charles Jasper Joly, m.a., 



r.T.C.D. 



"A Note on certain Curves connected with the Double Normals of 

 Plane Bicircular Quartics and Cyclides." By J. Gilbart Smyly, 



M.A., P.T.C.D. 



"Notes on the Tinnecarra Cromlech near Boyle." By the Bev. 

 Francis E. Clarke, m.d., ll.d. 



" On the Conditions for Maximum and Minimum Solutions in the 

 Calculus of Variations when certain Fluxions of the Variables 

 have Finite and Arbitrary Variations." By E. P. Culverwell, 



M.A., F.T.C.D. 



^ ' On the Dates of Volcanic Eruptions and their Concordance with the 



Sun-Spot Period." By Joseph P. O'Beilly, c.e. 

 " Investigation of the Prehistoric Settlements near Boundstone, Con- 



nemara." Eeport of the Committee, consisting of Messrs. "W. J. 



Knowles, W. H. Paterson, K. L. Praeger, and F. J. Bigger. 

 " Irish Phasophycese (Eeport of the Fauna and Flora Committee)." 



By Thomas Johnson, d.sc, f.l.s., and Henry Hanna, m.a., b.sc. ; 



assisted by Miss E. Hensman and Miss M. C. Knowles. 

 "Geometry of Surfaces derived from Cubics." By Eobert Eussell, 



M.A., r.T.C.D. 



Of the same volume, Part IV. will be laid on the table to-day, 

 and Part V., completing the volume, is in the Press, and will be 

 published shortly. 



The following Papers will also be published shortly, in the 

 Transactions : — 



^'On the Latent Heat of Evaporation of Saline Solutions." By 

 Frederick T. Trouton, sc.d., f.e.s. 



