xl 



Natural selection in man, intensity of (Pearson), 469. 



Nerve and muscle, process of excitation in (Lucas), 495. 



Nervous system, factors in rhythmic activity of (Brown), 278. 



Nitrogen fixation by aerobic organisms, conditions influencing (Bottoinley), 466. 



Norris (D.) See Harden and Norris. 



Obituary Notice : — 



Sir J. D. Hooker, i. 

 Opsonic index estimations, improved method for (Russ), 138. 



Oxydases, distribution in plants and rule in formation of pigments (Keeble and Arm- 

 strong), 214. 



Oxyhemoglobin, specific conductivity of solutions of (Stewart), 413. 



Pancreatic diabetes, nature of (Knowlton and Starling), 218. 

 Pearson (K.) The Intensity of Natural Selection in Man, 469. 

 Penfold (W. J.) See Harden and Penfold, and Hort and Penfold. 



Physiological effects of low atmospheric pressures on Pike's Peak (Douglas and 

 others), 65. 



Porter (A. W.) and Edridge-Green (F. W.) Negative After-images and Successive 



Contrast with Pure Spectral Colours, 434. 

 Protozoa from sick soils (Martin), 393. 

 Prunase and enzyme action (Armstrong and others), 359. 



Radium in carcinomatous tumours (Lazarus-Barlow), 170. 



Reductase of liver and kidney, studies on (Harris and Creighton), 486. 



Reflex rhythm and concurrent excitation (Forbes), 289. 



Revis (C.) The Production of Variation in the Physiological Activity of Bacillus coli by 

 the Use of Malachite-Green, 192. 



Robertson (M.) Notes on some Flagellate Infections found in certain Hemiptera in 



Uganda, 234 ; Notes on certain Aspects of the Development of Trypanosoma 



gambiense in Glossina palpalis, 241 ; Morphology of Trypanosoma gallinarum in 



Glossina palpalis, 380 ; Notes on the Polymorphism of Trypanosoma gambiense 



in the Blood and its Relation to the Exogenous Cycle in Glossina palpalis, 527. 



Ross (E. H.) The Development of a Leucocytozoon of Guinea-pigs, 67. 



Russ (C.) An Improved Method for Opsonic Index Estimations, involving the Separa- 

 tion of Red and White Human Blood Corpuscles, 138. 



Russell (B. R. G.) The Manifestation of Active Resistance to the Growth of Implanted 

 Cancer, 201. 



Ryland (H. S.) and Lang (R. T.) An Instrument for Measuring the Distance between 

 the Centres of Rotation of the Two Eyes, 53. 



Salivary secretion and capillary pressure (Hill and Flack), 312. 



Saunders (E. R.) Further Contributions to the Study of the Inheritance of Hoariness in 



Stocks (Matthiola), 540. 

 Schneider (E. C.) See Douglas (C. G.) and others. 

 Secretory and capillary pressure (Hill and Flack), 312, 439. 



Shattock (S. G.) and Dudgeon (L. S.) Certain Results of Drying Non-sporing Bacteria 



in a Charcoal-Liquid Air Vacuum, 127. 

 Sherrington (C. S.) See Brown (T. G.) and Sherrington. 



Snow (E. C.) The Influence of Selection and Assortative Mating on the Ancestral and 



Fraternal Correlations of a Mendelian Population, 195. 

 Soils, protozoa from sick (Martin), 393. 



