Ivi 



Index 



r Nature, 



\_Septeniber 29, 192 1 



and Achievements of, Dr. J. A. Fleming, 369 ; Weather 



Messages for the Benefit of Navigators, 598 

 Woburn Agricultural Experiments, Continuance of the, 



754 

 Women's Minimum Wages, Mrs. W. J. Barton, 605 

 Work, Health and. Dr. C. S. Myers, 354 

 World : and Empire Development, G. H. Knibbs, 441 ; 



Citizenship, Education and, 707; Trade, The Metric 



System and, 417 

 Worms Die?, Why Do, Rev. H. Friend, 172; G. T. 



Harris, 269; W. J. L. Abbott, 490; J. H. Coate, 491 

 Wrightson's Hypothesis of Audition, Dr. H. Hartridge, 



811 



X-ray : Reflection by Diamond, The Intensity of, Sir W. H. 

 Bragg, 477 ; Spectrum of Palladium from Fluorspar, 

 The Reflection of the, H. Pealing, 477 ; Structure of 

 Potassium Cyanide, The, P. A. Cooper, 745 



X-rays : and Radium, Protective Measures against, 557 ; 

 and their Physiological Effects, A. B. Bruce, 140 : 

 Crystal-reflection of. The Nature of the, Sir Joseph 

 Larmor, 126 ; General Practice and, Alice V. Knox. With 

 chapters on the Production of X-rays and Instrumenta- 

 tion, by Dr. R. Knox, 454 ; in Medical Practice, 454 ; 

 The Protection against, of Persons other than the 

 Operator and Patient, G. Contremoulins, 382. 414 



Yale University, Prof. J. R. Angell elected President of, 

 156 



Yeasts : Advances in the Study of. Dr. D. Ellis, 387 ; The, 

 Prof. A. Guilliermond. Translated and revised by Dr. 

 F. W. Tanner, 387 



Ytigaren, Trials of the, 600 



York Museum, Dr. W. E. Collinge appointed Keeper ol 

 the, 60 



Yorkshire as an Earth-block surrounded by Down-folded 

 Strata, Dr. J. E. Marr, 827 



Young's Interference Experiment, Dr. R. A. Houston, 268 ; 

 Lord Rayleigh, 298 ; Prof. P. N. Ghosh, 362 ; and the 

 Spectrometer, Prof. J. K. Robertson, 457 



Zinc : in the Organism of the Rabbit during Growth, The 

 Variation in the Proportion of, G. Bertrand and R. 

 Vladesco, 703 ; in the Phenomena of Fertilisation in 

 the Animal Vertebrates, The Probable Intervention of, 

 G. Bertrand and R. Vladesco, 735 ; in Vertebrate 

 Animals, The Causes in the Variation in the Amount 

 of, G. Bertrand and R. Vladesco, 222 ; Metallic, The 

 Production of, Sir R. A. S. Redmayne ; The Writer 

 of the Note, 361 ; Statistical and Technical Informatfon 

 upon, 1913-19, G. Rigg, 279; The Electrolytic Recovery 

 of, S. Field, 252 



Zoology : An Elementary Text-book, Sir A. E. Shipley and 

 Prof. E. W. MacBride. Fourth edition, 295 ; An Intro- 

 duction to. Prof. C. H. O'Donoghue, 740; for Medical 

 Students, 740 ; Vertebrate, Prof. H. H. Newman, 229 ; 

 West Indian, Prof. J. Stanley Gardiner, 829 



Zoomikrotechnik : Ein Wegweiser fiir Zoologen und 

 Anatomen, Prof. P. Mayer, 71 



PRINTED IN GREAT BRITAIN BY THE CORNWAI.I, PRESS, I.TD., PARIS GARDEN, STAMFORD STREET, WJNDON, S.E. I. 



