PROCEEDINGS FOR 1902 XXXVII 
The officers elected for the ensuing year are :— 
President—Dr. Goodwin. 
Vice-President—Dr. Ellis. 
Secretary—Capt. Deville. 
Papers read before the section: — 
(a) Mathematics. 
“On the Correlation of the Curve of the Second Order and the 
Sheaf of Rays of the Second Order in Geometry of Position,” by Pro- 
fessor A. Baker. 
“On the Matrix Analysis of Quantics and their Concomitants,” by 
Dr. J. C. Glashan. 
“Forms for the Abelian Integrals of the Three Kinds,” by Dr. J. 
C. Fields. 
“A Theorem regarding Determinants with Polynomial Elements,” 
by Professor W. H. Metzler. 
(b) Physics. 
“On the Use of the Wheatstone Stereoscope in re Sur- 
veying,” by Capt. E. Deville. 
“The Neutral Axis of Beams under Transverse Loads,” by Pro- 
fessor H. T. Bovey. 
“ Soli-Lunar Time,” by Mr. G. W. McCready. 
“The Potential Difference required to Produce Discharge in Air 
and other Gases,” by Mr. W. R. Carr. 
“ Penetrating Rays from Radium,” by Professor E. Rutherford. 
“ Radio-active Emanations from Thorium and Radium,” by Pro- 
fessor E. Rutherford. 
“Excited Radio-activity from the Atmosphere,” by Mr. 8. J. Allan. 
“ Radio-activity Induced in Salts by Cathode Rays, and by the 
Discharge Rays from an Electric Spark,” by Mr. W. R. Carr. 
“ Radio-activity Induced in Substances exposed to the Action of 
Atmospheric Air,” by Mr. R. M. Stewart. 
“On the Absolute Value of the Mechanical Equivalent of Heat,” 
by Professor H. T. Barnes. 
“ On the Density of Ice,” by Professor H. T. Barnes and Mr. H. L. 
Cooke. 
“The Variation in the Density of Ice,” by Mr. H. L. Cooke. 
“The Fall of Potential Method as applied to the Measurement of 
the Resistance of an Electrolyte in Motion,” by Professor H. T. Barnes 
and Mr. J. G. W. Johnson. 
