CONTENTS. 



VOL. LXX. 



iJOj^M 



No. 459. 



Page 



A Comparative Study of the Spectra, Densities, and Melting Points of 

 some Groups of Elements, and of the Eelation of Properties to 

 Atomic Mass. By Hugh Eamage, B.A., A.B.C.Sc.L, St. John's 

 College, Cambridge. Communicated by Professor G. D. Liveing, 

 F.B.S. (Plates 1, 2) , 1 



Experimental Besearches on Drawn Steel. — Part I. Magnetism and its 

 Changes with Temperature. — Part II. Besistivity, Elasticity, and 

 Density, and the Temperature Coefficients of Besistivity and Elas- 

 ticity. By J. Beginald Ash worth. Communicated by Professor 



Schuster, F.B.S , 27 



On the Spark Discharge from Metallic Poles in Water. By Sir Nor- 

 man Lockyer, K.C.B., F.B.S. (Blate 3) 31 



The Differential Equations of Fresnel's Polarisation-vector, with an 

 Extension to the Case of Active Media. By James Walker, M.A., 

 Communicated by Professor Clifton, F.B.S 37 



On a Throw-testing Machine for Beversals of Mean Stress. By 

 Osborne Beynolds. F.B.S., and J. H. Smith, M.Sc, Whitworth 

 Scholar, Victoria University 44 



The Equilibrium of Botating Liquid Cylinders. By J. H. Jeans, B.A., 

 Isaac Newton Student and Fellow of Trinity College, Cambridge. 

 Communicated by Professor G. H. Darwin, F.B.S 46 



No. 460. 



On the Action of the Spurge (Euphorbia hiberna, L.) on Salmonoid 

 Fishes. By H. M. Kyle, M.A., D.Sc, St. Andrews University. 

 Communicated, by Professor Mcintosh, F.B.S , 48 



On Chemical Dynamics and Statics under the Action of Light. By 

 Meyer Wilderman, Ph.D., B.Sc. (Oxon.). Communicated by Dr. 

 Ludwig Mond, F.B.S 66 



On a Convenient Terminology for the Various Stages of the Malaria 

 Parasite. By E. Bay Lankester, M.A., F.B.S., Director of the 

 Natural History Department, British Museum 74 



Croonian Lecture. — On Certain Chemical and Bhysical Properties of 

 Haemoglobin. By Arthur Gamgee, M.D., F.B.S., Emeritus Professor 

 of Physiology in the Owens College 79 



