320 TlMEHRI. 
in the cane is of the same composition as the amount of 
juice usually expressed, must now be considered obsolete. 
I lay before you (statistical paper, see pages 321 — 323) 
some results of analyses and fractional crushing of sugar 
cane and would like to draw your attention to one or two 
points ; for instance in results No. 3, you will see that 
I have obtained an expression of 75* [6 0/0 juice and 
that the three quantities of juice do not vary very much 
as to the percentage of total sugar they contain ; but 
the sugar in 1 1*54 0/0 of juice left in megass, drops down 
to 7"82 0/0. As I was not able to obtain more than 
75 0/0 of juice I cannot say how much strong juice there 
is in cane. It is very probable that there may be 80 to 
85, the last few per cent, of liquid would therefore con- 
tain little or no sugar. In this instance 75 0/0 crushing 
gave an extraction of 94 0/0 sugar, now this amount 
is quite as good as could be got in a diffusion battery, 
but unhappily there are very few mills that do 75 0/0 
crushing. I doubt very much if there is a mill in this 
colony that does more on an average than 70 0/0 ; this 
is equal to an extraction of 85 0/0 sugar ; the average 
crushing of the colony is not more than 60 0/0 equal to 
an extraction of 75 0/0 sugar. If we are to go on using 
mills, it is time we gave up the term " crushing" as it 
does not mean much. " Extraction of Sugar from Cane" 
is a more correct term. In results No. 4, I got 76*82 0/0 
crushing, equal to an extraction of 9372 0/0 sugar, while 
with 75'i6 0/0, in results No. 3, I obtained an extraction 
of 94*09 0/0 of the sugar in the cane ; of course this is 
accounted for, by the difference in composition of the 
two lots of cane. I also give you what in my opinion is 
the average composition of the British Guiana cane as 
