V 



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The Influence of Selection and Assortative Mating on the Ancestral and Fraternal 

 Correlations of a Mendelian Population. By E. C. Snow, M.A., D.Sc, 

 Biometiic Laboratory, University College, London. Communicated by Prof. 

 Karl Pearson, F.R.S 195 



The Nature of the Immune Reaction to Transplanted Cancer in the Rat. By Wm. 



H. Woglom, M.D. Communicated by Sir J. R. Bradford, Sec. R.S 197 



The Manifestation of Active Resistance to the Growth of Implanted Cancer. 

 By B. R. G. Russell, M.D. Communicated by Sir John Rose Bradford, 

 Sec. R.S. ; 201 



The Distribution of Oxydases in Plants and their Role in the Formation of 

 Pigments. By Frederick Keeble, Sc.D., Professor of Botany, University 

 College, Reading, and E. Frankland Armstrong, Ph.D., D.Sc. Communicated 

 by W. Bateson, F.R.S 214 



On the Nature of Pancreatic Diabetes. (Preliminary Communication.) By F. P. 



Knowlton and E. H. Starling, F.R.S 218 



The Measurement of Trypanosoma rhodesiense. By J. W. W. Stephens, M.D. Cantab., 

 D.P.H., and H. B. Fantham, D.Sc. Lond., B.A. Cantab. Communicated by 

 Sir Ronald Ross, K.C.B., F.R.S. (Plate 3) 223 



Notes on some Flagellate Infections found in Certain Hemiptera in Uganda. By 



Muriel Robertson. Communicated by Sir J. R. Bradford, Sec. R.S 234 



Notes on Certain Aspects of the Development of Trypanosoma gambiense in Glossina 

 palpalis. By Muriel Robertson. Communicated by Sir J. R. Bradford, 

 Sec. R.S '. , 241 



No. B 579.— July 25, 1912. 

 Petrifactions of the Earliest European Angiosperms. By Marie C. Stopes, D.Sc.j 

 Ph.D., F.L.S., Fellow of University College, London. Communicated by 

 D. H. Scott, F.R.S., Pres. L.S. (Abstract) 249 



On the Instability of a Cortical Point. By T. Graham Brown and C. S. Sherrington, 



F.R.S 250 



The Factors in Rhythmic Activity of the Nervous System. By T. Graham Brown 



(Carnegie Fellow). Communicated by Prof. C. S. Sherrington, F.R.S 278 



Reflex Rhythm Induced by Concurrent Excitation and Inhibition. By Alexander 



Forbes, M.A., M.D., Harvard. Communicated by Prof. C. S. Sherrington, F. R.S. 289 



Antelope as a Reservoir for Trypanosoma gambiense. By H. L. Duke. Com- 

 municated by Sir J. R. Bradford, K.C.M.G., Sec. R.S 299 



The Relation between Secretory and Capillary Pressure. I. — The Salivary 

 Secretion. By Leonard Hill, F.R.S., and Martin Flack (Eliza Ann Alston 

 Research Scholar) 312 



The Effects of Ultra-violet Rays upon the Eye. (Report of experiments carried out 

 for the Glassworkers' Cataract Committee of the Royal Society.) By Dr. E. K. 

 Martin. Communicated by Sir J. R. Bradford, Sec. R.S. (Plates 4—7) 319 



