NORTHERN SUGAR INDUSTRY 



99 



towards their free edges. The perforations should be sufficiently numerous 

 to allow nearly the whole volume of juice to pass through each shelf 

 in drops or spray. The sulphur is burned in the furnace {B), passes 

 through a horizontal flue {€). in the bottom of which is water for 

 the purpose of absorbing any sulphuric acid that may be formed 

 during the combustion.* The sulphur fumes enter the box and pass 

 back and forth upward through the box. At (0), a steam pipe is inserted 

 in the flue so that additional draft may be secured. If the flue, how- 

 ever, be made high, little use for the steam jet will be found. The juice 

 comes from the mill through the pipe {A.) If the mill be on the same 

 line with the sulphur box a pump should be attached to it to elevate 

 the juice to the proper altitude. This method of sulphurizing is sim- 

 ple and economical, and, if care be given to the furnace to secure a reg. 

 ular combustion of the sulphur, reasonably satisfactory. 



(b) A better method of mixing the gas with the juice is found in the 

 mechanism represented in Fig. 10. The figure represents a section 

 through the center of the sulphur box. 



J ft. lOin. 



■-6/t, 



.X = liJet fai' SOg^^as 



CROSS SECTION. 



Fig. 10. 



The sulphur fumes enter through the opening (X) in the side of the 

 box. A flue from the furnace where the sulphur is burned fits into the 

 opening. The paddle-wheels turn in the direction of the arrows and 

 with a velocity sufficient to throw into spray the juice entering the in- 

 let and project it on to the shelf, whence it passes through the outlet 

 to a juice tank. The paddle-wheel is so adjusted that there is always 

 enough juice in the box to seal the inlet and thus prevent the air from 

 entering. The box should be as nearly as possible air-tight. The suc- 

 tion produced by the paddles makes a sufficient draft for the furnace. 

 The proper speed of revolution of the wheel is one hundred and fifty 

 to three hundred per minute. The box is used by Mr. E. W. Deming, 



Tor sirup making this is not necessary. 



