506 SORGHTM. 



Champaign Sugar Company, Champaign, III. 



TROFESSORS WEBER AXD SCOVEI.L. 



1. Cane passed through a 3 roll mill, the bagasse saturated with, 

 hot water, and then passed through a second 3 r.)ll mill ; the juice 

 from both mills received in a common tank. 



2. Juice treated witli milk of lime in defecators to neutralization, 

 as shown by litmus paper; then heated to boiling and skimmed. 

 After skimming, alloAved to settle half an hour or more, and then the 

 clear juice is drawn off from the sediment. 



3. Juice from defecati)r is evaporated in open pan to 25° Beaume, 

 and the semi-syrup drawn off into settling tanks'. 



4. After having deposited its impurities, the semi-syrup is drawn 

 ofl' from the sediment and filtered through bone-coal. 



5. The semi-syrup from the bone-coal filters is evaporated t > me- 

 lada in vacuum pan ; and, after being purged in centrifugal, tlie mo- 

 lasses is again boiled in vacuum pan to 40° Beaume for second sugars. 



Agricultural Department University of Wisconsin, Madison, Wisconsin. 



PHOFliSSOR SWF.XSOX. 



. 1. Cane pressed as soon as possible after cutting, and the juice 

 strained through a straw filter (bucket filled with straw). 



2. Juice heated to lukewarmness and made slightly alkaline with 

 lime, as shown by litmus paper, then heated to boiling as quickly as 

 possible, and steam turned off; then skimmed, and again heated to 

 slight boiling, the steam again turned off, and the fresh scum removed. 

 This operation is repeated two or three times, giving finally a clear 

 juice nearly free from sediment. 



3. The defecated juice is evaporated in open pan to about 20*^ 

 Beaume, 



4. From the evaporator the semi-syrup is taken to vacuum pan, 

 and evaporated to about 42° Beaume, thence emptied into tin-lined 

 wooden vats, each holding about 50 gallons, wdiere it is allowed to re- 

 main three or four days. , 



Every step hurried as much as possible, averaging about three hours 

 from time cane was pressed till the drawing off from the vacuum pan 

 into the crj'stallizing tanks. 



This process, as will be seen, differs somewhat from the method de- 

 scribed by Professor Sweuson, and published in the Report of the Com- 

 mittee of the National Academy of Science upon " The Sorghum Su- 

 gar Industry," p. 84. 



The chief difference is in the method of defecation. 



