PLATES. 



I. & II. Illustrative of Dr. Meyer Wilderinan's Paper on the Velocity 

 of Reaction before Complete Equilibrium and before the Point of 

 Transition, &c. 



III. Illustrative of Prof. S. P. Lang-ley's Paper on the New Spectrum. 



IV. Illustrative of Mr. J. Rose-Innes and Prof. S. Young's Paper on the 



Thermal Properties of Isopentane compared with those of Normal 



Pentane. 

 V. Illustrative of Prof. J. A. Fleming and Mr. A. VV. Ashton's Paper 



on a Model which Imitates the Behaviour of Dielectrics. 

 VI. Illustrative of Prof. J. Trowbridge's Paper on the Spectra of 



Hvdrogen, and some of its Compounds. 

 VII.-IX, Illustrative of Prof. T. W. Richards and Mr. E. H. Archibald's 



Paper on the Study of Growing Crystals by Instantaneous 



Photomicrography. 



ERRATUM. 

 Page 532, last line of footnote, for vol. xiv. read vol. xv. 



