142 TlMEHRI. 
cane, Bellouguet or white Java cane, Penang cane 
and Diard cane ; and from numerous analyses (78), 
made during 1861-1864, be deduced the mean compo- 
sition of the juice of ripe canes as being : — 
Sugar 18-36 
Other organic matter 035 
Salts 029 
Water 8roo 
I have not yet been able to obtain Dr. Icery's original 
memoir, and having some doubt whether this estimate 
represented percentage in volume or percentage by 
weight, I recalculated the mean amount of sugar in the 
65 analyses of mature cane juice given in Dr. Icery's 
tables, and found the actual per centage by weight to 
be of sucrose 177 and glucose '65 or together 18*35 — a 
result that entirely corroborates Dr. Icery's figures. 
The richest juice obtained by Dr. leery had a density 
of 1 [-99° Bm., and contained 21*52 per cent, of sucrose 
by weight. Judging by acreage returns, Mauritius 
grows canes as rich in sugar as those of any other 
country, yet of the 78 samples examined, not one yielded 
juice of a higher density than 12 Bm., or had a saccha- 
rine richness much greater than that ordinarily attributed 
to cane. 
More recently, Harland found in juice from mixed 
Queensland canes, 18*30 per cent, of sucrose, and '45 
per cent, of glucose; and in juice from canes grown in 
the Philippines, 18*30 per cent, sucrose, and *io per cent, 
glucose. I think also that the experience of planters 
throughout the West Indies would show that the juice 
they have to deal with, does not average more than 
1 8*5 per cent, of total sugar, or say, 2*00 lbs. per gallon. 
I have been informed on good authority that the mean 
