IV ROYAL SOCIETY OF CANADA 



SECTION III. 



MATHEMATICAL, PHYSICAL AND CHEMICAL SCIENCES. 



I. Abacus of the Altitude and Azimuth of the Pole Star 



(Diagrams). By Dr. E. Devillk 3 



II. A Subjective Phenomenon of Vision (Diagrams). Bv W. 

 EuPERT Turnbull. Communicated by Dr. G. U. 



Hat 13 



III. On the Conservation of Nitrogen iîi Manure (Diagr&xn.). By 



Thomas Macfarlane 37 



lY. On the Metallic Currency of the British Empire. By Thos. 



Macfarlane 46 



Y. On the Analysis of Wheat en Flour. By Thomas Mac- 

 farlane 57 



YI. Anchor-Ice formation from the standpoint of the Radiation 

 Theory, together with i<ome early Memoirs on Ground- 

 ice. By Dr. H. T. Barnes 65 



YII. The Foundations of Geometry — Presidential Address to Sec- 

 tion III (Diagrams). By Prof. Alfred Baker Ill 



YIII. Temperature Records of Nocturnal Radiation (Diagrams). 



By Dr. H. T. Barnes 127 



IX. Further notes on the difference in Temperature between 

 McGill College Grounds and Mount Royal, Montreal 

 (Diagrams). By Prof. C. H. McLeod and Dr. H. T. 



Barnes 141 



X. Effect of an Electric Current on the Modulus of Elasticity 

 (Diagrams). By E. W. Boyle. Communicated by 



Dr. H. T. Barnes 159 



XI. The Effect of Tensile Stress on Electrical Resistance 

 (Diagrams). By E. W. Boyle. Communicated by 



Dr. H. T. Barnes 171 



XII. A Method of determining the Specific Heat of a Gas at Con- 

 stant Pressure (Diagra,m<i). ByH.T. Dawes. Com- 

 municated by Prop. J. C. McLennan 189 



XIII. Deficient Humidity of the Atmosphere. By T. A. Starkey 



and Dr. H. T. Barnes 203 



SECTION lY. 



geological and bioloqical sciences. 



I. The Gypsum Deposits of New Brunswick (Maps and Plates). 



BjDr. L. W. Bailey 3 



II. The Sleeping Sickness. By Sir James Grant, K.C.M.G 15 



III. An Early Anadidymus of the Chick (Plate). By Prof. 



Eamsay Wright 21 



