MONOGRAPHS ON THE PROGRESS OF 



RESEARCH IN HOLLAND 



DURING THE WAR 



EDITORIAL BOARD 



R. HouwiNK, Delft; J. A. A. Ketelaar, Amsterdam 



10. Experimental Embryology by M. W. WOERDEMAN 

 and Chr. Raven. 



11. Sexual-Endocrinology of Non-Mammalian Verte- 

 brates by L. H. BRETSCHNEIDER and J. J. DUYVENE 



DE Wit. 



12. Chemical and Physial Investigations on Dairy Pro- 

 ducts by H. ElLERS, R. N. J. Saal, and M. VAN PER 



Waarden. 



15. The Wet Purification of Coal Gas and Similar Gases 

 by the Staatsmijnen-Otto-Process by H. A. J. PlETERS 

 and (D. W. van Krevelen. 



19. New Developments in Ferromagnetic Materials by 

 J. L. Snoek. 



20. Progresses in the Theory of the Physical Properties of 

 Glasses by J. M. StEVELS. 



