117 



Sucrose lost- 



On weight 

 of cane. 



On sucrose 

 in cane. 



On sucrose 

 extracted 

 in juice. 



In bagasse 



In skimmings 



By inversion (from excess of reducing sugar in final product 

 over that originally present in juice) 



Apparent, or analytical (one-third of excess of reducing 

 sugar) 



Burned in manufacture, spilled, and unaccounted for 



Total loss 



Per cent. 

 .5.18 

 1.09 



0.09 

 0.93 



Per cent. 



30.40 



6.38 



1.56 



0.54 

 5.45 



44.33 



Per cent. 



9.17 

 2.23 



0.78 

 7.84 



The percentage of sucrose lost in the bagasse in this test is consider- 

 ably higher than is the general rule in jSTegros, which, as estimated 

 previously, amounts on an average to a little less than 25 per cent of 

 the total sucrose in the cane. 



This is not the fault of the mill, which, when tested previously when grinding 

 a similar cane, produced a bagasse containing 169 parts "mill juice" to 100 fiber, 

 while the figure derived from tlie present new mill is 168, a very close agreement, 

 and somewhat better than the average mill in Negros. The loss rather is due 

 to the larger amount of fiber which these very dry canes carry, this being aggra- 

 vated by the introduction of about 2 per cent more fiber in the shape of dry 

 leaves, etc. Comparing 'Cane analysis No. 42," as made on a sample of 20 canes 

 taken from this field and ground in a hand mill, with the composition of the same 

 field deduced from the present mill control, very little difference Avill be noted 

 as far as the quality of the expressed juice is concerned; Brix and sucrose agree 

 Avithin 0.1 per cent, although, as the differences are in opposite directions, the 

 indicated purity of the mill juice from the large mill is almost 1 per cent lower 

 than that previously found by analysis; reducing sugar in the mill control is 

 0.60 per cent against only 0.22 found previously, but the difference is partially 

 accoimted for by the fact that the cane ground on a large scale had stood over 

 night before grinding, while the small sample had been analyzed immediately 

 after cutting. Cutting the cane tops a little higher up than was done for analysis 

 might also increase the percentage of reducing sugar. 



The extent to which the introduction of cane trash into the mill will reduce 

 the yield of sugar is clearly brought out by comparing these two analyses : The 

 clean cane previously was found to contain only 12.51 per cent of fiber, while the 

 figure derived from the analysis of bagasse during the mill test was. when cal- 

 culated back to the weight of the cane ground, 14.63, a difference of 2.12 per cent, 

 which could only be due to trash. Since it was found that in the mill 168 parts 

 of juice are held back by each 100 parts of fiber, it is evident that if only clean 

 canes had been ground the extraction of juice would have been 3.56 per cent 

 greater, so that 59.78 per cent of juice on the weight of the cane might have been 

 obtained instead of the 56.22 per cent which it actually yielded. In other words, 

 an increased extraction of juice and consequently of sugar over that really pro- 



duced. of , or 6.95 per cent, would have resulted, or in case of the average 



56.22 * 



