PLATES. 

 I. Illustrative of Mr. J. J. Coleman's Paper on Liquid Diffusion. 



II. Illustrative of Lord Rayleigh's Paper on the Behaviour of Iron and 



Steel under the Operation of Feeble Magnetic Forces. 



III. Illustrative of Prof. S. P. Thompson's Paper on an Arc-lamp. 



IV. Illustrative of Mr. T. Gray's Paper on an Improved Form of Seismo- 



V. & VI. Illustrative of Dr. W. W. J. Nicol's Paper on the Expansion of 

 Salt-Solutions. 



VII., VIII., IX., X. Illustrative of Drs. Ramsay and Young's Paper on 

 Evaporation and Dissociation. 



