SUPPLEMENTARY NUMBER. 



CONTENTS. 



LIX. On the Heat-conducting Power of Iron and German Silver. 

 By H. Weber of Brunswick. (With a Plate.) page 481 



LX. Supplementary Remarks on some early Logarithmic Tables. 

 By J. W. L. Glaisher, B.A., F.R.A.S., Fellow of Trinity College, 

 Cambridge 500 



LXI. Researches on Elective Attraction. By Edmund J. Mills, 

 D.Sc 506 



LXII. On Recurrent Vision. By A. S. Davis, M.A. 526 



LXIII. On the Theory of Electrodynamics. By M. Helmholtz. 530 



LXIV. Proceedings of Learned Societies : — 



Royal Society : — Mr. A. Schuster on the Spectrum of Ni- 

 trogen 537 



Geological Society ; — Mr. S. J. Whitnell on Atolls or La- 

 goon-islands ; Mr. J. R. Dakyns on the Glacial Phenomena 

 of the Yorkshire Uplands; Mr. D. Mackintosh on a Sea- 

 coast Section of Boulder-clay in Cheshire ; The Rev. William 

 Bleasdell on Modem Glacial Action in Canada; The Rev. 

 O. Fisher on the Phosphatic Nodules of the Cretaceous Rock 

 of Cambridgeshire 541-543 



LXV. Intelligence and Miscellaneous Articles : — 



On the Absorption of Ozone by Water, by L. Cams 544 



On the Heat of Expansion of Solid Bodies, by H. Buff 544 



Experiments on Collision with Balls of different Metals, by H. 

 Schneebeli 546 



Index 549 



With Title-page, Contents, &c. 



.*' 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, ^^leet Street, London. 





