REPORT OF THE CHEMIST. 



49 



Per cent, of sucrose in diffusion juice 4. 73 



Per cent, of other sugars in diffusion juice 2. 12 



Per cent, of total sugars in diffusion juice 6.85 



Weight of total sugars obtained , „ kilograms.. 82. 89 



Per cent, of sucrose in pulp .27 



Per cent, of other sugar in pulp .06 



Per cent, of sucrose in waste water .03 



Per cent, of other sugar in waste water .07 



Per cent, of total sugar in pulp and waste water .43 



Weight of total sugar lost kilograms.. 5. 32 



Total sugars in 1)90 kilograms cane do 88. 21 



Per cent, of total sugars obtained 93. 97 



Per cent, of total sugars lost 0. 03 



It is thus seen that out of 100 parts of sugar in the cane on November 

 7, 93.07 parts were obtained. Compare with this the result of the (the- 

 oretical mill work) — 



Weight of juice from 990 kilograms (50 per cent.) kilograms.. 495. 00 



Weight of juice not obtained do 333. 00 



Per cent, of juice (and saccharine matters) extracted do 57.3 



Total sagar in 990 kilograms cane do 88. 21 



Of which obtained by the mill do 51. 85 



Total sugar lost do 33. 30 



Per cent, of total sugar obtaiued do 62. 3D 



Per cent, of total sugar lost do 37. 61 



Per cent, of total sugar lost by diffusion do ('. 03 



Gain by diffusion per cent.. 31.58 



It appears from the data of the analytical work that the gain in sugar 

 by diffusion over ordinary milling is from 23 to 30 per. cent., and over 

 double milling from 15 to 20 per cent. Until November 14 it was im- 

 possible to use the small vacuum pan which had been procured for these 

 experiments, and therefore the results iu masse cuite and sugar could 

 not be kept separate. On November 14 the following data were ob- 

 tained : 



Analyses. 



Diffusion juice, November 14 : 



Specific gravity 1. 0-106 



Sucrose 6.04 



Other sugars 2.10 



Parity 67.5 



Total solids 9.05 



Mill juice, same cane and date : 



Specific gravity 1. 065 



Sucrose 9.95 



Other sugars 3. '29 



Purity 64.4 



Total solids 15.13 



Mela da obtained, 196. 4 kilograms (by diffusion): 



Per cent, sucrose 52. 50 



Per cent, other sugars 20. 85 



Weight of chips diffused kilograms.. 1,596 



Weight of juice obtained do 1, 929 



Weight of sucrose in masse cuite do 103 



Percentage of masse cuite to cane do 12. 23 



LOSS OF SUGAR. 



The pulp from the 1,5G9 kilograms of cane weighed 1,929 kilograms. 

 It contained .12 per cent, sucrose, and .00 per cent, other sugars. Then 

 1,929 x. 0008=1.54 kilograms of sugar lost in waste water. Total loss 

 in both, 5.01 kilograms. 



The masse cuite obtained above is well crystallized, but the crystals 

 are so small and the proportion of gum so great that it has not been 

 possible to purge it easily in the centrifugal. 

 4 A— >S4 



