REPORT OF THE CHEMIST. 



319 



tent. The chips "being heavier than sorghum easily overweighted 

 the elevator and caused it to clog. Considerable delay was caused by 

 these annoyances. 



THE DIFFUSION. 



It was found at once that the temperature used for the diffusion of 

 sorghum, viz, 70° C, was entirely too low to effect- the extraction of 

 sugar from sugar cane. 



The temperature was gradually raised to 90° C. before a satis- 

 factory extraction was obtained. The chips lying closer together 

 in the cell caused the circulation of the liquid in the battery to take 

 place more slowly. It was clearly evident that the pressure afforded 

 by the feed-tank of the battery, viz, two-thirds of an atmosphere, is 

 not great enough to work a battery rapidly when twelve cells are 

 under x)ressure. 



On November 6, all the cane having arrived and a i)reliminary 

 trial having been made, the second trial was made. The experience 

 of the first attempt had shown how the great loss of sugar in the 

 chips, especially in the beginning, might be avoided. The second 

 run was, therefore, made with an initial temperature of nearly 90° 

 C. The quantity of juice withdrawn at each time was also increased 

 by 100 liters. 



Weight of cane used. — The weight of cane used in the second trial 

 was 83.25 tons. 



ANALYSES OF THE CANES. 



The samples of chips were taken as described before: 



First sample . . 

 Second sample 

 Third sample . 

 Fourth sample 

 E'ifth sample. . 

 Sixth sample . 



Means 



ANALYSIS OF DIFFUSION JUICES. 



The samples were taken as before described: 



First sample . . 

 Second sample 

 Third sample . 

 Fourth sample 

 Fifth sample . . 

 Sixth sample . . 



Means 



Total 

 solids. 



Per cent. 

 10.11 

 10. 15 

 10.08 

 10.05 

 9.83 



Sucrose. 



Percent. 

 7.33 



7.95 

 7.15 

 6.96 

 7.03 

 6.55 



9.86 



7.16 



Glucose. 



Per cent. 

 1.18 

 1.20 

 1.17 

 1.29 

 1.29 

 1. 22 



1.2;3 



