Page 



Contributions to the Chemistry of Chlorophyll. No. VII. Phyllopor- 

 phyrin and Hsematoporphyrin : a Comparison. By Edward Schunck, 

 F.R.S., and Leon Marchlewski, Ph.D 233 



List of Presents 236 



An Enquiry into the Nature of the Vesicating Constituent of Croton 

 Oil. By Wyndham E. Dunstan, M.A., F.R.S., and Lucy Everest 

 Boole, F.I.C., Lecturer on Chemistry in the London School of 

 Medicine for Women 237 



No. 356.— February 6, 1896. 



Impact with a Liquid Surface, studied by means of Instantaneous 

 Photography. By A. M. Worthington, M.A., F.R.S., and R. S. Cole, 

 M.A 250 



A new Method of determining Freezing Points. By Meyer Wildermann. 

 Ph.D 251 



List of Presents , 254 



February 13, 1896. 



On the Behaviour of Argon and Helium when submitted to the Electric 

 Discharge. By J. N. Collie, Ph.D., F.R.S.E., and William Ramsay, 

 Ph.D., F.R.S 257 



On the Generation of Longitudinal Waves in Ether. By Lord Kelvin, 

 F.R.S 270 



On the Discharge of Electricity produced by the Rontgen Rays, and 

 the Effects produced by these Rays on Dielectrics through which 

 they pass. By J. J. Thomson, M.A., F.R.S., Professor of Experi- 

 mental Physics, Cambridge 274 



On the Absorption of the extreme Violet and ultra- Violet Rays of 

 the Solar Spectrum by Haemoglobin, its Compounds, and certain 

 of its Derivatives. By Arthur Gamgee, M.D., F.R.S., Emeritus 

 Professor of Physiology in the Owens College, Victoria University.... 276 



List of Presents 279 



February 20, 1896. 



Bakerian Lecture. — On the Diffusion of Metals. By W. C. Roberts- 

 Austen, C.B., F.R.S., Professor of Metallurgy, Royal College of 

 Science 281 



List of Presents , 285 



February 27, 1896. 



On the Spinal-root Connections and Ganglion-cell Connections of the 

 Nerve-fibres v-hich produce Contraction of the Spleen. By E. A 

 Schafer, F.R.S., and B. Moore 287 



