PLATES. 



I.-V. Illustrative of Messrs, K. Honda and T. Terada's Paper on 

 the Effect of Stress on Magnetization and its Reciprocal 

 Relations to the Change of Elastic Constants by Magneti- 

 zation. 

 VI. & VII. Illustrative. of Mr. W. L. Upson's Paper on the Electric Arc. 

 VIII. Illustrative of Prof, R. W. Wood's Paper on the Magnetic 

 Rotation of Sodium Vapour at the D lines. 

 IX. Illustrative of Prof. E. Taylor Jones's Paper on a Short- 

 Period Electrometer, and its use in Determining the 

 Frequencies of Slow Electrical Oscillations. 

 X. Illustrative of Mr. G. H. Martyn's Paper on the Discharge 

 of Electricity from Hot Bodies. 

 XI. Illustrative of Mr. J. Russell's Paper on the Superposition of 

 Mechanical Vibrations upon Magnetization, and conversely, 

 in Iron, Steel, and Nickel. 

 XII. Illustrative of Mr. A. Campbell's Paper on the Measure- 

 ment of Mutual Inductance by the Aid of a Vibration 

 Galvanometer. 



XIII. Illustrative of Mr. P. V. Bevan's Paper on Lloyd's Fringes 



for Internal Reflexion. 



XIV. Illustrative of Prof. E. H. Barton's Paper on the Lateral 



Vibration of Bars treated simply. 

 XV. Illustrative of Mr. C. V. Raman's Paper on the Curvature 

 Method of Determining the Surface-Tension of Liquids. 



XVI. Illustrative of Mr. J. S. Dow's Paper on a Form of Cosine 

 Flicker Photometer. 



XVII. Illustrative of Prof. E. Castelli's Paper on Gradual Modifi- 

 cation of the First Linear Spectra of Emission of Mercury. 



