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 



*1 



2 2 8 



^2 32 



d 



"^E 



3^ 2.E<? 



D 



%j\ 



233 



h 



2kij 2.30 



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. 



