366 
ON THE JUICE OF THE SUGAR-CANE. 
The analyses of different kinds of cane completely developed, in order to 
determine tlie relative quantities of water, saccJiarine, and ligneous sub- 
stance. 
Name of Sugai 
Esvue. 
Species of Cane. 
Water. 
Sugar. 
Ligneous 
Substance. 
Labour don nais 
Diard 
0-698 
0-20o 
0-102 
Guingham 
0-682 
0-209 
0'109 
La Gaiete* 
Diard 
0-703 
0-197 
0100 
Pinang 
0-678 
0-196 
0-126 
Bellouguet 
0-716 
0-197 
087 
Bamboo 
0-695 
0-190 
0-115 
J» 
Guingham 
0-703 
0-186 
0-111 
>» 
Bellouguet 
0-703 
0-203 
0094 
f J 
Pinang 
0-690 
0-198 
0-112 
Bellouguet 
0-729 
0-187 
0-084 
' 
Guingham 
0-697 
0-196 
0-107 
» » 
Bambou 
0-669 
0.214 
0-117 
II 
Gtaite 
0-703 
0-210 
€•107 
ortical. 
Nodular. 
1074 
... 1069 
17-9 
... 171 
The saccharine matter is not equally distributed in the different 
parts of the sugar cane ; the central or medullary portion is richer than 
the nodular or cortical. When a piece of sugar cane is separated 
in such a manner as to be able to compress individually the knots, the 
parts between such knots, and the bark roughly detached and carrying 
away with it a certain quantity of medullary structure, results are 
obtained of which the following example will give an exact idea : — 
Medullary portion. 
Density at 25° centigr. ... 1082 
Quantity of sugar per cent. ... 18*4 
Such an experiment as this is a complete justification of what I have 
stated above, that the relative richness of the juice depends on the 
pressure employed. Such richness would be still more appreciable were 
the knotty portions of the cane not always so ■ much more completely 
crushed by the action of the cylinders than the part nearest the bark which 
as is well-known, ii on issuing from the mill, the least bruised and the 
most humid. 
Those canes which have been a ttacked by the disease which I 
described under the term " degeneration " about three years ago, do not 
generally contain less saccharine than the healthy canes with which 
they are compared. The analyses I have made in this respect 
confirm what the planters had already been able to recognise in the 
* La Gaiet^ is the fine estate in the Flacq District of Mauritius, belonging to 
Dr. leery. 
