The Influence of the Force of Gravity on the Circulation. By Leonard 

 Hill, M.B., Assistant Professor of Physiology, University College, 

 London, and Grocers' Research Scholar 192 



List of Presents ... 197 



Observations of Sun-spot Spectra, 18791894 By J. Norman 

 Lockyer, C.B., F.R.S 199 



No. 343. January 17, 1895. 



The Trusts of the Royal Society. By Sir John Evans, K.C.B., 

 Treasurer R.S 202 



The Latent Heat of Evaporation of Water. By E. H. Griffiths, M.A., 

 Sidney Sussex College, Cambridge 212 



On Slow Changes in the Magnetic Permeability of Iron. By William 

 M. Mordey 224 



List of Presents .. 242 



January 24, 1895. 



Notes of an Enquiry into the Nature and Physiological Action of 

 Black-damp, as met with in Podmore Colliery, Staffordshire, and 

 Lilleshall Colliery, Shropshire. By John Haldane, M.A., M.D., 

 Lecturer in Physiology, University of Oxford 249 



Mathematical Contributions to the Theory of Evolution. II. Skew 

 Variation in Homogeneous Material. By Karl Pearson, University 

 College, London 257 



On the Distribution of Assimilated Iron Compounds, other than Haemo- 

 globin and Hsematins, in Animal and Vegetable Cells. Preliminary 

 Communication. By A. B. Macallum, Associate-Professor of 

 Physiology, University of Toronto 261 



Micro-metallography of Iron. Part I. By Thomas Andrews, F.R.S. 

 [Title only.]. ." . 262 



List of Presents ... 262 



January 31, 1895. 



Argon, a New Constituent of the Atmosphere. By Lord Rayleigh, 

 Sec R.S., and William Ramsay, F.R.S., Professor of Chemistry, 

 University College, London 265 



On the Spectra of Argon. By William Crookes, F.R.S., &c...... 287 



The Liquefaction and Solidification of Argon. By Dr. K. Olszewski, 

 Professor of Chemistry in the University of Cracow 290 



On the Spark Spectrum of Argon as it appears in the Spark Spectrum 

 of Air. By W. N. Hartley, F.R.S., Professor of Chemistry, Royal 

 College of Science, Dublin .'. 293 



List of Presents ... 296 



