vii 



No. 473. 



rage 



The Differential Invariants of a Surface, and their Geometric Signifi- 

 cance. By Professor A. R. Forsyth, F.R.S. (Abstract) 331 



The Electrical Conductivity of Solutions at the Freezing-point of 

 Water. By W. C. D. Whetham, F.R S., Fellow of Trinity College, 

 Cambridge 332 



The Resistance of the Ions and the Mechanical Friction of the Solvent. 

 By Friedr. Kohlrausch, Foreign Member R.S 338 



Upon the Immunising Effects of the Intracellular Contents of the 

 Typhoid Bacillus as obtained by the Disintegration of the Organism 

 at the Temperature of Liquid Air. By Allan Macfadyen, M.D. 

 Communicated by Lord Lister, O.M., F.R.S 351 



On the Histology of Uredo dispersa, Erikss., and the "Myeoplasm" 

 Hypothesis. By H. Marshall Ward, Sc.D., F.R.S., Professor of 

 Botany in the University of Cambridge. (Abstract) , 353 



The (Estrous Cycle and the Formation of the Corpus Luteum in the 

 Sheep. By Francis H. A. Marshall, B.A. Communicated by Pro- 

 fessor J. C. Ewart, F.R.S. (Abstract) 354 



On the Culture of the Nitroso-bacterium. By H. S. Fremlin, Lymph 

 Laboratories, Chelsea Bridge. Communicated by Sir Michael Foster, 

 K.C.B., Sec. R.S 356 



The Statolith-theory of Geotropism. By Francis Darwin, M.A., M.B., 

 F.R.S 362 



On the Laws governing Electric Discharges in Gases at Low Pressures. 

 By W. R. Carr, B.A., University of Toronto. Communicated by 

 Professor J. J. Thomson, F.R.S. (Abstract) 374 



On the Optical Activity of Hsemoglobin and Globin. By Arthur 

 Gamgee, M.D., F.R.S., Emeritus Professor of Physiology in the 

 Owens College, Victoria University, and A. Croft Hill, M.A., M.B., 

 late George Henry Lewes Student in Physiology 376 



On the Nucleoproteids of the Pancreas, Thymus, and Suprarenal Gland, 

 with especial Reference to their Optical Activity. By Arthur 

 Gamgee, M.D., F.R.S., Emeritus Professor of Physiology in the 

 Owens College, Victoria University, and Walter Jones, Ph.D., Asso- 

 ciate Professor of Physiological Chemistry in the Johns Hopkins 

 University 385 



No. 474. 



A Note on a Form of Magnetic Detector for Hertzian Waves, adapted 

 for Quantitative Work. By Dr. J. A. Fleming, F.R.S., Professor of 

 Electrical Engineering in University College, London 398 



A New Form of Self-restoring Coherer. By Sir Oliver Lodge, F.R.S. 402 



On Central American Earthquakes, particularly the Earthquake of 

 1838. By Admiral Sir John Dalrymple Hay, Bart., G.C.B., F.R.S. .. 403 



The Emanations of Radium. By Sir William Crookes, F.R.S. 



405 



