Vlll CONTENTS OF VOL. XXIV. SIXTH SERIES. 



Notices respecting New Books : — Page 



G-esammelte Werke Walther Eitz 891 



Proceedings of the Geological Society 895-901 



Intelligence and Miscellaneous Articles : — 



The Diffusion of Alkali Salt Vapours in Flames, by 

 Prof. H. A. Wilson 902 



Index 903 



PLATES. 



I. Illustrative of Dr. J. G. Gray's Paper on the Magnetic 

 Properties of a Graded Series of Nickel-Manganese 

 Alloys. 

 II. Illustrative of Mr. P. W. Bridgman's Paper on Breaking 

 Tests under Hydrostatic Pressure and Conditions of 

 Rupture. 

 III.-V. Illustrative of Mr. H. E. Ives's Paper on the Photo- 

 metry of Lights of Different Colours. 

 VI.-VUI. Illustrative of Prof. J. A. Pollock's Paper on the Origin 

 of the Small Bubbles of Froth. 

 IX. Illustrative of Sir J. ,7 . Thomson's Paper on Further 

 Experiments on Positive Pays. 

 X.-X1I. Illustrative of Mr. C. V. Raman's Paper on the Main- 

 tenance of Forced Oscillations of a New Type. 



XIII. Illustrative of Prof. Richardson and Mr. Comptou's 



Paper on the Photoelectric Effect. 



XIV. Illustrative of Mr. L. B. Smyth's Paper on the Supply 



of Radium Emanation from the Soil to the Atmo- 

 sphere. 

 XV. Illustrative of Sir J. J. Thomson's Paper on Multiply- 

 charged Atoms. 

 XVL-X1X. Illustrative of Prof. R. W. Wood's Paper on Resonance 

 Spectra of Iodine by Multiplex Excitation. 

 XX. Illustrative of Dr. S. R. Milner's Paper on the Current- 

 Potential Curves of the Oscillating Spark and the 

 Mechanism of Spark Conduction. 

 XXL & XXII. Illustrative of Prof. E. II. Barton and Mr. Walter 

 13. Kilby's Paper on Dust Figures produced by 

 Electric Sparks. 

 XXIII. Illustrative of Mr. C. W. Heaps's Paper on the Effect 

 L of Magnetic Fields on Resistance, 



