116 MAN-UAL FOB SUGAR GHOWERS, 



it is then reburned and after washing is again fit for 

 use. 



It is worth while remembering that only those 

 bleaching agents that bleach by reduction are of 

 value in the sugar industries. Oxidizing agents, 

 which are frequently used as bleaching agents in 

 other industries, do not bleach, but darken cane- 

 juice and its products. 



