372 



CHAPTER XVIII 



is connected to the last body by a pipe and valve, one also being located on 

 the drain pipe. A third connection communicates with the atmosphere. 

 When this receptacle is full, communication to the save-all is cut off, and 



r\ 



w 



228 



2 32 



3 



233 



\ 



23J 



2 35" 



the air cock and valve leading to the last effect are opened, when the contents 

 are sucked therein. 



In the complete absence of these devices, the writer has seen 3 per cent. 

 of the juice lost in the evaporation, a loss reduced to less than o-i per cent. 

 by their well-advised application. 



