212 



MICRO-ORGANISMS AND FERMENTATION. 



holes ; this is connected with the cold-water main during the 

 cooling of the wort ; the water flows out at N. The stirrer 

 J is set in motion by means of toothed wheels. The height 

 of the liquid in the cylinder is indicated by means of a float, 



FIG. 56. 

 Yeast-propagating apparatus devised by Bergh and Jorgensen. 



connected with which is a pointer and arc L. Connected 

 with the top of the cylinder is the bent tube K. At the 

 bottom is the cock Q, which is in connection with the pipe b. 

 Both the bent tubes dip into the vessel R, which is filled with 

 water. 



