22 



MICRO-ORGANISMS AND FERMENTATION. 



edge of the cap and also the lateral tube are well closed. This 



c 



FIG. 7. CARLSBERG Flask. Old Model. 



flask is also suited to a prolonged preservation of gelatines, if 

 these are to be prevented from getting hard on the surface. 



FIG. 8. CARLSBERG Flask. New Model. &, connection between the flask and the bent tube. 



For the development of very large cultures the Carlsberg 

 vessels (Figs. 7 and 8) are employed. They have a capacity 



