

CONTENTS OF VOL. IV 



PAGE 



Oxford on the Upper Grade. H. E. A i 



Palaeolithic Races and their Modern Representatives : Magda- 



lenian Man and the Eskimo. Illustrated. W. J. Sollas, D.Sc, 



F.R.S 16 



The Deleterious Effects of Bright Light upon the Eyes. J. 



Herbert Parsons, B.S., D.Sc, F.R.C.S. 46 



Ultramicroscopy and Ultramicroscopic Particles. Illustrated. H. 



Thirkill, B.A., B.Sc. . 55 



Recent Work on the Determination of Sex. Leonard Doncaster, 



M.A 90 



The Use of Liquid Ammonia as a Solvent. Percy May, B.Sc. . 105 

 The Degeneration of Armour in Animals. Illustrated. Felix 



Oswald, D.Sc, B.A., F.G.S 123 



Recent Progress in the Study of British Carboniferous Plants. 



E. A. Newell Arber, M.A., F.L.S., F.G.S 135 



The Organisms of the Soil. E. H. L. Schwarz, A.R.C.S., F.G.S. . 150 

 The Sewage Disposal Problem. F. N. Kay Menzies, M.D., D.P.H. . 177 

 Chemistry of the Cell Nucleus. W. D. Halliburton, M.D., F.R.S. . 197 

 Isomeric Change. Part II. The Mechanism of Isomeric Change. 



Illustrated. T. Martin Lowry, D.Sc 213 



The Leucocytozoa : Protozoal Parasites of the Colourless Corpuscles of 



the Blood of Vertebrates. Illustrated. Annie Porter, B.Sc. . . 248 

 Professor Ridgeway and Racial Origins. Bernard Houghton, B.A., 



F.R.A.I, ............. 267 



The Chemistry of the Morphine Group of Alkaloids. H. E. 



Watt, D.Sc, F.I.C 279 



The Genesis of Igneous Rocks. John W. Evans, D.Sc, LL.B. . . 306 

 The Evolution of Animal Function. Part II. Keith Lucas . .321 

 The Transmission of Photographs by Telegraphy. Illustrated. 



T. Thorne Baker, F.C.S., F.R.P.S 332 



Factors which Determine Fertility in Soils. Illustrated. Edward 



J. Russell, D.Sc. (Lond.) ....;.... 353 



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