Sulphuric Acid-manufacture. 



Diagram IV. 

 Heat of chamber 3 feet from bottom. 



Length of chamber in feet. 



is: 



1(1 



20 30 40 50 60 70 80 91 



) 



100 110 120 



130 140 





P 



1 



























































































































































































































































































































200 

 8 

 6 

 4 

 2 



190 

 8 

 6 

 4 

 2 



180 

 8 

 6 

 4 

 2 



170 

 8 



n 



4 » 



160 



a B 

 8 ^ 



6 3 



4 e 



2 



150 

 8 

 6 

 4 

 2 



140 

 8 

 6 

 4 

 2 



130 

 8 

 6 

 4 

 2 



120 

 8 

 6 

 4 



112 



10 20 30 40 



50 60 70 80 !S0 100 

 Length of chamber in feet. 



10 120 130 140 



