Molecular Hydrogen and Its Spectrum. By Owen Willans 



Richardson 

 The Changing World of the Ice Age. By Reginald Aldworth 



Daly 

 The Realm of the Nebulae. By Edwin Hubble 

 Embryonic Development and Induction. By Hans Spemann 

 Protein Metabolism in the Plant. By Albert Charles Chibnall 

 The Material Basis of Evolution. By Richard Goldschmidt 



IN PRINT 



The Integrative Action of the Nervous System. By Charles S. 



Sherrington 

 The Evolution of Modern Medicine. By Sir William Osier 

 Blood: A Study in General Physiology. By Lawrence J. Hen- 

 derson 

 On the Mechanism of Oxidation. By Heinrich Wieland 

 Centennial of the Sheffield Scientific School. Edited by George 



A. Baitsell 

 Elementary Particles. By Enrico Fermi 

 Paleontology and Modern Biology. By David M. S. Watson 

 The Planets. Their Origin and Development. By Harold C. 

 Urey 



