XXXII THE ROYAL SOCIETY OF CANADA 
4.—A Long Period Spectroscopic Binary, by W. E. Harper, M.A.; 
presented by J. 8. Plaskett, B.A. 
5.—Further Experimental Work in the Nitrogen-Enrichment of 
Soils, by F. T. Shutt, M-A., F.I.C., F.CS. 
6.—Heat of Solution of Radium Emanation, by R. W. Boyle, 
M.Sc., Ph.D.; presented by Dr. A. 8. Eve. 
7.—Absorption of Rôntgen and Gamma Rays: a Comparison, by 
A. 8. Eve, D.Sc. 
8.—Radiation and Absorption of Light in Gaseous Media with 
Applications to the Intensity of Sky Radiation, by L. V. King. 
9.—The Movement of an Earth Particle during Microseisms, by 
Otto Klotz, LL.D. 
10.—Comparative Intensities of the Earth Penetrating Radiation 
on Land and Sea, by J. C. McLennan, Ph.D. 
11.—Resolution of Spectrum Lines by Lummer Glass and Quartz 
Plates, by J. C. McLennan, Ph.D. 
12.—The Geodetic Survey of Canada, by Charles A. Bigger, D.L.S., 
C.E. 
13.—On the Active Deposit of Actinium, by J. C. McLennan, 
PhD: 
14.—On a Thermodynamic Measure of the degree of Polymeriza- 
tion of Liquid Substances, by M. M. Garver, presented by J.C. McLennan, 
Ph.D: 
15.—A new method of determining the range of Molecular Action 
and the thickness of liquid Films, by M. M. Garver, presented by J. C. 
McLennan, Ph.D. 
16.—Notes on the Molecular Attraction in Liquids and Liquid 
Films, by J. C. McLennan, Ph.D. 
17.—The Spectroscopic Determination of the Solar Rotation, by 
J.S. Plaskett, B.A. 
On the motion of Dr. Deville, seconded by Dr. Klotz the report 
of section III was adopted. 
Report of Section IV. 
Section IV held four sessions which were attended by four- 
teen members. In the absence of Mr. President, Professor Adami, 
the chair was occupied by the Vice-President, Dr. Nicholls, and at the 
concluding session by Dr. A. H. Mackay. Professor McMurrich acted 
as Secretary in the absence of Professor Mackenzie. 
Seventeen papers, a list of which is appended, were read before the 
section either in full or by title, and were discussed by members of the 
Section. 
