PLATES. 



I. II. III. IV. Illustrative of Mr. J. J. Waterston's Paper on certain 

 Thermomolecular Relations of Liquids and their Saturated 

 Vapours. 



V. Illustrative of M. R. Ruhlmann's Paper on the Alteration produced 

 by Heat in the Velocity of Propagation of Light in Water. 



VI. Illustrative of M. Berthelot's Paper on a New Thermometer for mea- 

 suring Temperatures above the Boiling-point of Mercury, and Mr. 

 J. Gill's on the Dynamical Theory of Heat. 





