Xvii 
MonpDAY EVENING, JANUARY 19TH, 1880. 
Section I.— Physical and Expervmental Science. 
(With which the “ Dublin Scientific Club” is associated.) 
HOWARD GRUBB, M.E., F.B.A.S., in the Chair. 
The following Communications were laid before the Section :— 
G. F. FitzGera.p, F.T.c.D.—-‘‘ Note on the Conductivity of Tourmaline.” 
G. F. Firzcerap, F.T.c.D.—“ Note on the Construction of absolute 
Electrometers.” 
(Proceedings, Vol. II., N.S.) 
Professor J. Emerson ReEYNoLDs, M.D.—Short Reports from the 
Chemical Laboratory of Trinity College : 
No. 8.—“‘On the production of Specular Deposits of Lead 
Sulphide.” 
No. 9.—‘‘ On the Desulphuration of Thiocarbonide.” 
Professor W. F. BARRETT, F.R.S.E.—‘“‘ On Edison’s Loud-speaking Tele- 
phone, and the Theory of its Action.” 
Section I1.—Natural Science. 
(With which the “‘ Royal Geological Society of Ireland” is 
associated. ) 
G. JOHNSTONE STONEY, D.SC., F.R.S., in the Chair. 
The following Communications were laid before the Section :— 
Rev. Dr. Haucuton, F.R.s.—“‘ On an Application of Prof. Rossetti’s 
newly-discovered Law of Cooling to the question of Radiation of 
Heat from the Earth, and to problems of Geological Climate and 
Time.” 
(Proceedings, Vol. II., N.S.) 
Dr. Frazer, F.R.0.8.1.—Exhibited Bopyrus Squillarum, parasitic on 
Palemon serratus, and an Antler of Red Deer, obtained from the 
Dodder Bar in the River Liffey. 
MonDAY EVENING, FEBRUARY 16TH, 1880. 
Section I.—Physical and EHxpervmental Science. 
(With which the “ Dublin Scientific Club” is associated.) 
WENTWORTH ERCK, LL.D., in the Chair. 
The following Communications were laid before the Section :— 
Cuarues E. BurTON, B.A., F.R.A.S.—‘ Physical Observations of Mars, 
1879-80.” 
(Transactions, Vol. II., Part XII.) 
