IV ROYAL SOCIETY OF CANADA 
II. On the Radio-activity of Lead and other Metals. By 
Pror. J. C. McLennan and V. E. PouND........ 
III. The Amount of Radium Present in Typical Rocks in the 
immediate Neighbourhood of Montreal (Diagram). 
By A. 8. Eve ard D. McInrosæ. Communicated by 
PROPS, ROOTED LEUR le ce» eta ire ni coheed TRE 
IV. On the Amount of Radium Emanation in the Atmosphere 
near the Earth's Surface (Diagram). By A. $. Eve. 
Communicated by Pror. RUTHERFORD............ 
V. Researches in Physical Chemistry carried out in the 
University of Toronto. Communicated by Pror. W. 
ASE MATTE aid wi «60 du EEE ARR 
VI. Equilibrium between Ice and Water (Diagram). By 
DES fC, 5 BARNES ue ILE Chore hme NU AE 2 
VII. On the Purification of Peaty Waters by Freezing. 
VIII. The Fertilizing Value of Snow. By F. T. SHUTT...... 
IX. A certain Type of Isoperimetric Problem, in particular, 
the Solid of Maximum Attraction (Diagrams). By 
Norman R. Witson 
X. The Effect of Temperature and of Velocity of Gas Cur- 
rent on the Absorption of Radio-active Emanations by 
Charcoal (Diagrams). By R. W. Borie. Communi- 
cated by Pror. RuTHERFORD 
i 
SECTION IV. 
I. The Influence of Electrolysis on the Nerve Centres. By 
SIR JAMES GRANT, 1K COMEG Mii eee eee 
II. A New Genus and a New Species of Silurian Fish 
(Plate). |) By Dr.) G.\PSMiuereiay ee eee eee 
III. A Contribution to our Knowledge of the Origin and 
Development of Certain Marsh Lands on the Coast 
of New England (Illustrated). By D. P. PEN- 
PAR THOW Le 2 NN ee 
IV. Notes on the Preparatory Stages of some species of 
Canadian Lepidoptera. By Dr. JAMES FLETCHER 
and ARTHUR GIBSON......... 
V. Presidential Address. The Biological Investigation of 
Canadian Waters, with special reference to the Gov- 
ernment Biological Stations. By Pror. E. E. PRINCE 
VI. Notes on Fossil Woods from Texas (Plates). By 
DA PANPENEHALLOW. 1.1 MENT 
VII. Notes on the Geology of the Islands of Trinidad and Bar- 
bados, British West Indies. By R. W. Etts...... 
13 
19 
25 
29 
31 
35 
39 
85 
13 
57 
