Illb. 19. 157 



Growth. 



L. The influence of different hormone-concentrations on 

 the growth of tissue-cultures of embryonic origin. We 

 search for the optimal concentration of several hormones 

 (growth-promoting hormone, oestrone, a.o.) for diffe- 

 rent sorts of tissues. Gallus domesticus. 



J. G. CODDENS 



Differentiation. 



J. Einfluss weiblicher Sexualhormone auf die Histogenese 

 von Triton alpestris. R. SCHENK 



J. Investigation of the relation of external media and Ilia. 19. 

 physical surfaces on the migration and differentiation 

 of Amphibian tissues in vitro. Species of Amblystoma 

 and Triturus. H. E. LEHMAN 



L. Nuclear differentiation and development. Chicken. 



C. P. DAGG and A. M. SCHECHTMAN 



M. The behavior of tissues from the early mouse embryo 

 in tissue culture and in the anterior chamber of the eye. 



C. GROBSTEIN 



