Xll 
MonpDay Eveninc, May 191u, 1879. 
Section I.—Physical and Experimental Science. 
(With which the “ Dublin Scientific Club” is associated.) 
The Rev. GERALD MOLLOY, D.D., in the Chair. 
The following Communications were laid before the Section :— 
G. F. FirzGeraLp, F.T.c.D.— Note on Ayrton’s Theory of Terrestrial - 
Magnetism.” 
Cuartrs A. CAMERON, M.D.—‘“‘ Note on the Absorption of Selenium by 
Plants.” 
(Proceedings, Vol. II., Part ITT.) 
Section Il.—Natural Science. 
(With which the “ Royal Geological Society of Ireland” is 
associated.) 
(Gis Jak HONAHAN, M.R.LA., President Royal Geological Society of 
Ty eland, in the Chair. 
The following Communications were laid before the Section :— 
Joun Aparr, M.A.—-‘‘On some effects of the recent severe frosts on 
Ornamental Plants.” 
Rev. Dr. Haveuton, F.R.s.—‘ On the Annual Water Discharge of the 
Ganges, the Brahmap (tra, the Nile, the La Plata, and the Mississipi- 
Nasourl Rivers ; with an account of a New Method of calculating the 
Annual Water Dischar ge of any River, by which the labour of eee 
vation is greatly reduced.’ 
A. Leith ADAMS, M.D., F.R.S.—‘‘On the discovery by Mr. Ussher of 
Cappagh, of a Bone Cave in the County of Waterford, containing 
evidence of the co-existence of Man with the ‘Trish Elk,’ whose bones 
he had smashed and formed into implements.” 
(Proceedings, Vol. II., Part IIT.) 
R. W. Sincrair.—‘ Notes on Irish Lepidoptera.” 
(Proceedings, Vol. II., Part ITT.) 
G. H. Kinanay, M.Rr.1.4.—“ On a Table of the Irish Cainozoie, Mesozoic, 
and Paleozoic Rocks, showing the different thicknesses of the groups, 
and the nearly continuous sequence in the last.” 
