ON THE JUICE OP THE SUGAR-CANE. 
509 
II. — The Yield of Sugar from Different Juices. 
The yield of sugar obtained by the processes used in the colony of 
Mauritius is necessarily affected in a very sensible manner by its glucose 
transformation, and it may be generally said that whatever tends to 
develop it, concurs doubly to diminish the quantity of saccharine matter 
to be extracted from the juice ; for it not only produces the loss result- 
ing from the passing of the crystallizable sugar into the uncry stall izable 
state, but it also introduces into and accumulates in the syrups a matter, 
the presence of which becomes more and more an impediment to 
the separation of the sngar which is still found there in considerable 
proportion. 
The barrel of juice (247 litres) generally weighs 530 lbs. at least and 
544 lbs. at most. In the first case it contains about 75 lbs. of sugar, and 
in the second, 121 lbs. on the average ; this quantity of sugar may be 
estimated at 95 lbs. per barrel of the juice — the most usually manufac- 
tured. All things equal, the proportion of sugar obtained from a 
barrel of cane-juice will depend not only on the relative richness of this 
liquid, but also on the various circumstances in which the manufacture 
may be placed. And as such circumstances admit of considerable modi- 
fications, it becomes difficult to set down a figure which will represent 
the general and average yield of the sugar manufacture of the colony. 
I am, however, able to give, in ihis respect some particular indications 
which will allow an appreciation to be formed of the yield of establish- 
ments placed in the most favourable conditions. For this purpose I 
cannot do better than simply transcribe the information which has 
been kindly communicated to me by the Hon. C. Wiehe, the proprietor 
of one of the fintst and best administered sugar establishments in 
Mauritius. 
Labourdonnais Sugar Manufactory. The Hon. C. WieM and Company ; 
Riviere du Rempart, January 31, 1865. 
Average 
Net 
A verage 
Quantity of suga 
r of the 
Average barrels 
quantity of 
produce of 
yield per 
second and third 
boilings 
of liquid molasses 
sugar per bar- 
the crop. 
acre. 
per cent of the sugar of the 
for 100, 000 lbs. of 
rel of juice. 
first boiling. 
sugar. 
Crop. 
lbs. 
lbs. 
lbs. 
Second 
Third 
Total. 
1854 - 55 
80 
3,008,137 
— 
boiling 
boiling 
1855-56 
76| 
77| 
2,287,259 
— - 
or sugar 
or sugar 
1856-57 
3,381,800 
— 
of first 
of second 
1857-58 
73* 
2,790,000 
— 
Syrup. 
Syrup. 
1858-59 
72 
2,891,776 
- — 
1859—60 
70 
1,902,336 
— 
1860—61 
70± 
3,422,584 
5,415 
lbs. 
lbs. 
lbs. 
1861-62 
75| 
2,047,940 
3,250 
21 
6^ 
6 J 
27 s 
1862—63 
75| 
3,374,761 
4,712 
22 
s* 
28* 
1863-64 
75 
2,662,924 
3,848 
25 
8 
33.| 
33| 
As the results of my own experiments on my estate, La Gaiete, 
during the last two years correspond very nearly with the above, I do 
not think it necessary to reproduce them. 
