p l a;t e s. 



I. Illustrative of Prof. C. V. Eaman and Mr. Ashutosh Dey's 

 Paper on the Sounds of Splashes. 

 II. -V. Illustrative of Mr. G. A. Hemsalech's Paper on the Exci- 

 tation of the Spectra of Carbon, Titanium, and Vanadium 

 by Thermelectronic Currents. 

 VI. & VII. Illustrative of Mr. L. C. Jackson's Paper on Variably Coupled 



Vibrationsx 

 VIII. & IX. Illustrative of Dr. F. W. Aston's Paper on the Constitution 

 of Atmospheric Neon. 

 X.-XIII. Illustrative of Mr. J. S. G. Thomas's Paper on the Hot-wire 

 Anemometer. 

 XIV. Illustrative of Prof. C. V. Raman's Paper on a Mechanical 



Violin-Player for Acoustical Experiments. 

 XV. Illustrative of Dr. F. W. Aston's Paper on the Mass-Spectra 

 of Chemical Elements. 



ERRATUM. 



Page 169, line 13. For (i per unit mass of matter" read " per unit mass 



of the (ether? 



