PLATES. 



I. Illustrative of Mr. C. Vernon Boys's Paper on Measurement of 

 Curvature and Refractive Index. 

 II. Illustrative of Mr. F. D. Brown's Notes on Thermometry. 



III. Illustrative of Mr. W. J. Lewis's Crystallographic Notes. 



IV. Blustrative of MM. Elster and Geitel's Paper on the Electricity of 



Flame, and M. H. Brongersnia's on Double Refraction, produced 

 by Electrical Influence, in Glass and Bisulphide of Carbon. 



V. Illustrative of Mr. W. Baily's Paper on an Integrating Anemo- 



meter. 



VI. Blustrative of Mr. L. Fletcher's Crystallograpbic Notes. 



VIT. Blustrative of Dr. E. Goldstein's Papers on the Reflection of Elec- 

 trical Rays, and on the Influence of the Shape of the Katbode 

 on the Distribution of the Phosphorescent Light in Geissler's 

 Tubes. 



