38 



CHEMICAL CONTROL OF THE DIFFUSION EXPERIMENTS. 



The folio wing data respecting the diffusion experiments are abstracted 

 from Bulletin 17, pp. 83-89 : 



The first results from the experiments were obtained from the run of December 3, 

 1887. 



The juice was treated with .3 per cent, its weight of lime, and after the precipita- 

 tion of the lime with carbonic dioxide, an amount of lignite equal to 10 per cent, of 

 the weight of the sugar present was added. 



The j nice filtered readily through the presses, forming firm, hard cakes. The filtered 

 juice was treated with phosphate of soda, 15 pounds of this salt being added for each 

 5,000 pounds of juice. 



The phosphate produced an abundant flocculent precipitate, which filtered easily 

 through the twin filter presses, giving a juice of remarkable limpidity. The masse 

 cuite, however, was dark, and the molasses much inferior in color to that made by the 

 use of bone-black and ordinary clarification. 



The phosphate of soda did not produce as favorable results as had been expected, 

 and its further use was discontinued. 



Following are the data obtained in the first run : 



TABLE No, 39. First diffusion run, December 3, 1887. 



Caucused tons.. 80.3 



First sugar per ton pounds.. 146. 1 



Second sugar per ton de 40.1 



Total first and second sugars do 186.2 



Third sugar do 15.0 



Pounds. 



The total sugar in the cane at 90 per cent, juice was 220. 6 



Of this there was obtained 146.1 pounds at 97.50 144.4 



And 40.1 pound sat 91.6 36.7 



Total pure sucrose obtained 181. 1 



Left in chips 14.6 



Total left iu molasses and lost in manufacturing 24.9 



NOTE. The third sugar will not be dried until in May or June, 1888. The esti- 

 mates of third sugar have been made by Mr. E. C. Barthelemy. 



