ix 
MonpDAY EVENING, JANUARY 20TH, 1879. 
Section I—Physical and Experimental Science. 
(With which the “ Dublin Scientific Club” is associated.) 
The Right Hon. the Earl of Rosss, F.R.s., V.P., in the Chair. 
The following Communications were laid before the Section :— 
Professor H. E. Roscor, Pu.p., r.z.s.—‘ An Account of some Experi- 
ments on the supposed compound nature of the Elements.” 
Howarp Gruss, M.E., F.R.A.8.—“ Improvements in the Stereoscope.” 
G, JOHNSTONE STONEY, M.A., F.R.S.—‘‘ On the forms of the Curve of 
Polarization Stress and of the Curve of Conduction, and on the 
absolute zero of tensions in Gases.” 
Professor W. F. Barrgrt, F.R.3.£.—‘ On Edison’s Carbon Telephone.” 
R. J. Moss, F.c.s.—‘‘ On an improved method for determining the gases 
dissolved in water.” 
Report on Scientific progress by G. JoHNSTONE STONEY, M.A., F.R.S. :— 
“Recent experiments in Electricity made in England, France, and 
Sweden.” 
Professor BARRETT.—Exhibited “A Sound Mill.” 
STEPHEN YEATES.—Exhibited “ A new Form of revolving Mirror.” 
Section II —Natural Science. 
(With which the “ Royal Geological Society of Ireland” is 
associated. ) 
Professor E. HULL, M.A., F.R.S., in the Chair. 
The following Communications were laid before the Section:— 
Rey. S. HAuGHTON, M.D., F.R.s.—‘“ Geological Notes made during a 
walking tour in Devonshire, in the summer of 1878.” 
(Proceedings, Vol. II., Part IT.) 
W. Frazer, M.D.—“ On a map showing the island of Hy Brasil, by Sieur 
Tassin, the Geographer to Louis XIII.” 
(Proceedings, Vol. IL., Part IT.) 
MonpDAY EVENING, FEBRUARY 17TH, 1879. 
Section I—Physical and Experimental Science. 
(With which the “ Dublin Scientific Club ” is associated. ) 
HowARD GRUBB, M.E., F.R.A.S., in the Chair, 
The following Communications were laid before the Section :— 
G. F, FirzGerabp, M.A., F.1.c.D.—‘‘On M. Duter’s Experiments in 
Electric Accumulators.” 
(Proceedings, Vol. II., Part IT.) 
W. F. Barrett, F.R.S,.E.—“ On the Carbon Telephone, and the Theory of 
its Action.” 
