X1X 
Section II.—Natural Science. 
(With which the ‘“‘ Royal Geological Society of Ireland” is 
associated. ) 
Rev. Dr. HAUGHTON in the Chair. 
The following Communications were laid before the Section :— 
“ On the question of Suicide among Bees.” Being the subject of two 
Letters from Joun Lusy, Esq., Lu.p., to Rev. Professor Haughton, 
M: Dit F.Bi8.4) ES T.O.D, 
(Froceedings, Vol. IL., N.S.) 
A. B. Wynne, F.G.s.—‘‘ Notes on some points in the Physical Geology 
of the Dingle and Iveragh Promontories.” 
(Proceedings, Vol. II., N.S.) 
Monpbay EVENING, APRIL 19TH, 1880. 
Section 1—Physical and Experimental Science. 
(With which the “ Dublin Scientific Club” is associated ) 
J. EMERSON REYNOLDS, M.D., in the Chair. 
The following Communications were laid before the Section :— 
G. JOHNSTONE STONEY, D.SC., F.R.S.—‘‘ On a possible Cosmical Cause 
for the Gap in the series of Atomic Weights.” 
G. JOHNSTONE STONEY, D.Sc., F.R.S.—‘‘ Report on the Progress of 
Science—Lord Rayleigh’s Investigations on the Theory of the Spec- 
troscope.” 
G. JOHNSTONE STONEY, D.SC., F.R.S.—‘* A Direct Vision Spectroscope.” 
Captain ABNEY’s Photograph of the Spectrum exhibiting the Natural 
Colours was exhibited. 
WENTWORTH ERCK, LL.D., F.R.A.S.—Exhibited a new Form of constant 
Bichromate Battery. 
S. YeaTes—Exhibited Noé’s Thermo-Electric Battery, and an “ Aladin” 
Lamp. 
Section I1—Natural Science. 
(With which the “ Royal Geological Society of Ireland” is 
associated. ) 
Rev. M. H. CLoss, M.A., in the Chair. 
The following Communications were laid before the Section :— 
THomas PiunKkert, Esq.—‘‘ On a Trap-dyke in Poll-a-Phuca Mountain, 
Co. Fermanagh.” 
W. Wiuuiams, Esq.—‘‘ Changes of Climate as indicated by the Lacus- 
trine Deposits of Ireland.” 
W. R. M‘Nas, m.p.—Exhibited Models of Insectivorous Plants, and 
Engler’s Diagram Apparatus for Illustrating the Structure of 
Flowers. 
