IV ROYAL SOCIETY OF CANADA 



SECTIOIS^ iir. 



MATHEMATICAL, PHYSICAL AND CHEMICAL SCIENCES. 



I. Presidential Address. By Professor II. T. liovE y 3 



ir. Mii-hanisin for descriUing Conic Sections. liy Mr. J. J. Guest. 



(With illustrations) 25 



III. On .■<'>me measurements of the temperature of the river water 



opposite Montreal^ made dtirini/ the teinter with a differen- 

 tial platinum thermometer. By Mr. II. T. Barnes 3t 



IV. The Determination of the Co-ejficient of discharge for sharp- 



edged orifices ; and an investigation of the force of impact 

 of a half-inch Jet on vanes of various form.^. By Mr. J. T. 



Farmer. (With illustrations) 45 



V. On the Calculation of the Conductiritf/ of Electrolytes. By 



Professor J. G. MacGregor 65 



W. The Unification of Civil, Nautical and Astronomical Time. 



By Mr. G. H Lumsden 83 



Vir. The Distribution of Aerolites In Space. By Mr. Arthur 



Harvey 91 



\[l\. Observations of Soil Temperatures with Electrical Resistance 

 Thermometers. By Professors II. Ij. Callendar and C. 



II. McLeod. (With illustrations) 109 



JX. All Investigation to Determine the Relative Efficiencies of 

 Multiple-Expansion Engines. By Mr. A. L. Mellanbv. 



(W'ith illustrations) 127 



X. Sijmbollc Use of Demolvre's Theorem. By Professor Dui'Uis 167 

 XI. Some Experiments on the X-Rays. By Professors John Cox 



and IfuGii L. Callendar. (With illustrations) 171 



SECTION IV. 



(lEOLOfilCAL AND BIOLOGICAL SCIENCES. 



I. The Functional Development of the Cerebral Cortex in Differ- 

 ent Groups of Animals. By Professor Wesley Mills. ... 3 



II. The Psychic Development of Young Animals and its Physical 



(Somatir) Correlation, with Special Reference to the Brain. 

 By Professor Wesley Mills 19 



III. Cortical Cerebral Localization, with Special Reference to Ro- 



dents and JUrds. B}' Professor Wesley Mills 25 



IV. The Generic Characters of the North American Taxaceœ and 



Coniferœ. By Professor Penhallow. (With illustrations) 33 



