PLATES. 

 I. Illustrative of Mr. C. V. Boys's Paper on Quartz as an Insulator. 



II. Illustrative of Prof. E. J. Anderson's Paper on an Apparatus 



Illustrating Crystal Forms. 



III. Illustrative of Prof. E. Wiedemann's Paper on the Mechanics of 



Luminosity. 



IV. Illustrative of Dr. H. H. Hoffert's Paper on Intermittent Light- 



ning-Flashes. 



V. Illustrative of Mr. Charles Tomlinson's Paper on the Theory of 

 Hail. 



VI.-VIII. Illustrative of Mr. Tanakadate's Paper on the Thermal 

 Effect due to Reversals of Magnetization in Soft Iron. 



IX. Illustrative of Mr. J. T. Bottomley's Paper on Expansion with 

 Rise of Temperature of Wires under Pulling Stress, 



X. Illustrative of Mr. J. C. McConnel's Paper on Diffraction- 

 Oolours, with special reference to Coronas and Iridescent Clouds. 



XI. Illustrative of Mr. R. F. D'Arcy's Paper on the Viscosity of 

 Solutions. 



XII.-XIII. Illustrative of Prof. R. Threlfall's Paper on the Clark 

 Cell as a Source of small Constant Currents. 



XIV. Illustrative of Prof. R. Threlfall's Papers on the Application of 

 the Clark Cell to the Construction of a Standard Galvanometer, 

 and on the Measurement of High Specific Resistances, 



