PLATES. 



I. Illustrative of Prof. J. H. Poynting's Paper on Change of State : 

 Solid-Liquid. 



II. Illustrative of Mr. 0. J. Woodward's Paper on a Wave-apparatus 

 for Lecture-Purposes to illustrate Fresnel's Conception of Pola- 

 rized Light. 



III. Illustrative of Mr. T. Gray's Paper on Instruments for Measuring 

 and Recording Earthquake-Motions. 



IV., V., & VI., Illustrative of Mr. T. Gray's Paper on the best Arrange- 

 ment of the Wheatstone's Bridge for the Measurement of a par- 

 ticular Resistance. 



VII. & VIII. Illustrative of M. H. Becquerel's Experimental Investiga- 

 tions on Magnetic Rotatory Polarization in Gases. 



IX., X., & XL Illustrative of Mr. W. Grant's Paper on Curves of Elec- 

 tromagnetic Induction. 



