364 THURLOW AND PRATT. 
TABLE VIII.—Total loss of sugar. 
i Item. Rasédion Based 
By L 
weight. Gna eaL intro- 
Kilos. | Per cent. | Per cent. 
k. Sugar lost in molasses during run --.-----.---------------_------ 2,617 2.29 17.19 
l, Sugar lost in press skimmings during run -__--__----_-----_---- 1, 062 0. 93 6.96 
on: ‘Determined lossi (eal) anoee eee eee ee ee eee 3,679 8.22 24.15 
hh. Calculated loss 5. -- sas <8 se te eee cae a ee ae 3, 794 3.34 24.99 
2. (Undetermined loss! (—m) lease sae ee ne ee ee eee 115 0.12 0.84 
The high loss of sugar in molasses was to be expected on 
account of the low purity of the original juice. In spite of 
this the total loss of 24.99 per cent is abnormally large for a 
mill of this type and is to be attributed to the faulty design and 
overworking of the clarification system which caused an un- 
usually large amount of mud and juice to be sent to the slum tank 
and presses. This is apparent from the fact that a normal loss 
in filter presses is less than 1 per cent, while here it amounts to 
6.96 per cent. The increased extraction which would result from 
proper changes in this part of the mill is readily apparent. 
COMPARISON OF THE NEW WITH THE OLD PROCESS OF MANUFACTURE. 
From the data of the tests made by Walker,* in Negros, the 
writers have calculated that approximately 83 per cent of the 
total sugar introduced could have been obtained as raw sugar by 
the old process if the same crushing mill as described above had 
been used and operated with the same filter-press losses. There 
were 15,178 kilograms of sugar introduced, and 83 per cent of 
this amounts to 12,595 kilograms, or 208 piculs. On account of 
the low purity of this cane (82.2 per cent), the best that could 
be expected of the sugar obtained by the native process would be 
“Humedo,’ which has a grading of from 75- to 79.9-per-cent 
sugar. In all probability, the product would run “Corriente” 
which polarizes below 75 per cent. However, we will assume 
that ‘“Humedo” is produced and that this is worth 4 pesos (2 
dollars United States currency) per picul when No. 1 sugar (87 
per cent sugar and over) is worth 7 pesos. Then the sugar 
made by the native process would be worth 808 pesos. 
By the central process of manufacture we obtained 11,384 kilo- 
*The Sugar Industry in the Island of Negros. Manila (1910). 
- ee al 
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