CONTENTS of N° 252.— Fourth Series. 



I. On some Electromagnetic Phenomena considered in connexion 

 with the Dynamical Theory. By The Hon. J.W. Strutt, Fellow of 

 Trinity College, Cambridge page 1 



II. On the Function of the Blood in Muscular Work. By W. H. 

 Broadbent, M.D., Lecturer on Physiology at St. Mary's Hospital 

 Medical School . 15 



III. On Vital Force according to Age, and the "English Life Table." 

 By Thomas Rowe Edmonds, B.A. Cantab 18 



IV. Fundamental Principles of Molecular Physics. Reply to Pro- 

 fessor Bayma. By Professor W. A. Norton 34 



V. Note on the Hydrodynamical Theory of Magnetism. By Pro- 

 fessor Challis, M.A., F.R.S., F.R.A.S 42 



VI. Note on the Experimental Illustration of the Expansion of Pal- 

 ladium attending the Formation of its Alloy with Hydrogenium. By 

 W. Chandler Roberts, F.C.S., F.G.S 51 



VII. On the Polarization of Light by Air mixed with Aqueous Va- 

 pour. By Professor Haidinger 54 



VIII. On Ammonium Alloys, and on Nascent-Hydrogen Tests. By 

 Albert H. Gallatin, M.D., of New York 57 



IX. Proceedings of Learned Societies : — 



Royal Society: — Mr, G. Gore on a momentary Molecular 

 Change in Iron Wire, and on the Development of Electric Cur- 

 rents by Magnetism and Heat ; Messrs. E. Frankland and J. 

 N. Lockyer's Researches on Gaseous Spectra in relation to the 

 Physical Constitution of the Sun ; Mr. W. Huggins on a Me- 

 thod of viewing the Solar Prominences without an Eclipse, and 

 on the Heat of the Stars ; Sir W. Thomson on the Fracture of 

 Brittle and Viscous Solids by " Shearing " 59-73 



Gological Society 73-76 



X. Intelligence and Miscellaneous Articles : — 



On the Heat consumed in Internal Work when a Gas dilates under 



the Pressure of the Atmosphere, by M. J. Moutier 76 



Investigations on obscure Calorific Spectra, by M. Desains 78 



It is requested that all Communications for this Work may be addressed, 

 post-paid, to the Care of Messrs. Taylor and Francis, Printing Office, Red 

 Lion Court, Fleet Street, London. 



