1908] HASSELBRING— ASSIMILATION OF PENICILLIUM 193 



The spores which are able to germinate then have the whole of the 

 nutrient solution at their disposal and make more vigorous growth. 



In conclusion I wish to express my thanks to Professor Charles R. 

 Barnes, under whom this work was carried on; and to Professor 

 J. U. Nef of the Department of Chemistry for many helpful suggestions 

 relating to the chemical aspects of the work. 



The University of Chicago 



