XIX 



Section II. — Natural Science. 



(With which the " Royal Geological Society of Ireland" is 

 associated.) 



Kev. Dr. Haughton in tlie Chair. 

 The following Communications were laid before the Section : — 

 <* On the question of Suicide among Bees." Being the subject of two 

 Letters from John Luby, Esq., ll.d., to Bev. Professor Haughton, 



M.D., F.R.S., F.T.C.D. 



(Proceedings, Yol. II., 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.) 



Monday Evening, April 19th, 1880. 



Section 1. — Physical and ExperiTnental 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 exhibitiag the Natural 



Colours was exhibited. 

 Wentworth Erck, ll.d., F.R.A.S. — Exhibited a new Form of constant 



Bichromate Battery. 

 S. Yeates — Exhibited Noe's Thermo-Electric Battery, and an^Aladin" 



Lamp. 



Section II. — Natural Science. 



(With which the " Royal Geological Society of Ireland" is 

 associated.) 



Rev. M. H. Close, m.a., in the Chair. 



The following Communications were laid before the Section : — 



Thomas Plunkett, Esq. — ''On a Trap-dyke in Poll-a-Phuca Mountain, 

 Co. Fermanagh." 



W. Williams, Esq. — " Changes of Climate as indicated by the Lacus- 

 trine Deposits of Ireland. " 



W. R. M'Nab, m.d. — Exhibited Models of Insectivorous Plants, and 

 Engler's Diagram Apparatus for Illustrating the Structure of 

 Flowers. 



