66 TlMEHRI. 
Concerning the relation that exists between the 
density of juice and the sugar contents of the cane, the 
following observations may be considered w r orthy of 
attention. 
By dividing the percentage of total sugar present in 
different samples of cane by the number of degrees 
Bm. shown by the juice, fairly uniform quotients 
are obtained, although the canes themselves may exhibit 
great difference of composition. This is shown by the 
table on page 69, compiled from the results of analyses 
made at the Government Laboratory of 33 samples of 
cane of various sorts taken at random. 
The meaning of the column headed P-^B° may be 
taken as 1*35, and serves as a useful faCtor for ar- 
riving approximately at the percentage of sugar in 
a sample of cane from the density of the juice in 
Bm. degrees. This simple method, needing no chemi- 
cal process whatever, gives more accurate results than 
the method of partial analysis described by Professor 
HARRISON as being almost universally pra6lised by 
chemists. For example, a sample of cane was found to 
contain 12*99 per cent, of fibre, and yielded juice of u*2 # 
Bm. containing 19*97 P er cent * °f tota l sugar. The 
percentage of sugar in this cane would have been repre- 
sented by the chemists in question as 17*67, whereas the 
aftual percentage was only 14*65. Now by multiplying 
the number of degrees Bm. by 1*35, the number 
15*12 is obtained, which is only 0*47 in excess of the 
true percentage, as against 3*02. The extent to which 
this simple rule can be trusted may be ascertained by 
comparing the figures in the column headed "B xI35 ,, 
