﻿CONTENTS of N° 251.— Fourth Series. 



LVITI. On the Spectra of certain Gases in Geissler's Tubes. By 

 A. Wullner , .......... page 405 



LIX. On the Motion of a Palladium Plate during the Formation of 

 Graham's Hydrogenium. By James Dewar, F.R.S.E. 424 



LX. Fundamental Principles of Molecular Physics. By Professor 

 J. Bayma, S. J., of Stonyhurst College 431 



LXI. On a Metallic Connector to replace the Vulcanite Tube used 

 with Bianchi's Air-pump. By William Swan, LL.D., F.R.S.E. &c, 

 Professor of Natural Philosophy in the University of St. Andrews : . . . 442 



LXII. Upon the new Conception of Electrodynamic Phenomena 

 suggested by Gauss. By R. Clausius 445 



LXIII. On some Spectrum Observations of Comets. By William 

 Huggtns, F.R.S 456 



LXIV. On Statical and Dynamical Ideas in Chemistry.— Part I. 

 Acid, Alkali, Salt, and Base. By Edmund J. Mills, D.Sc, F.C.S. 461 



LXV. Proceedings of Learned Societies : — 



Royal Society: — Mr. F. Guthrie on the Thermal Resistance • 

 of Liquids ; Mr. G. Gore on Hydrofluoric Acid 468-474 



LXVI. Intelligence and Miscellaneous Articles : — 

 On the Voltaic Deportment of Palladium, by J. C. Poggendorff .... 474 

 On the Electrical Polarity and Inequality of the Amalgamated Zinc 



Electrodes in Sulphate of Zinc, by E. Patry 475 



On a Development of Heat which accompanies the bursting of the 



Prince Rupert's Drops, by M. Dufour 478 



Index r 481 



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, Fleet Street, London. 



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