I 10 
W. G. Freemail. 
The results obtained by Watts in his experiments between 1900 
and 1904 are summarized by himself as follows:— 
Planted 
1900. 
Reaped 
1901. 
Planted 
1901. 
Reaped 
1902. 
Planted 
1902. 
Reaped 
1903. 
Planted 
1903. 
Reaped 
1904. 
“High” Canes 
2-296 
1-925 
2-113 
2-011 
2.290 
2-128 
2-304 
2-136 
•‘Low” Canes 
1-699 
1-905 
1-587 
1-793 
1-305 
2-035 
1-841 
1-937 
Difference on 
Canes Planted 
0-597 
— 
0-526 
— 
0-985 
— 
0-463 
— 
Difference on 
Canes Reaped 
— 
0-020 
— 
0-218 
— 
0-093 
— 
0-199 
The figures given throughout this table indicate the pounds of 
sucrose per gallon of juice in the basal portions of the canes 
analysed. In the column “ Planted ” is given the average sucrose 
per gallon contained in the basal portions of the ten canes from 
which the thirty cuttings were taken, whilst in the succeeding 
column, “ Reaped,” is recorded the average sucrose per gallon in 
the basal portion of the canes (those of less than ten joints 
excepted) grown from these cuttings. 
The sucrose contents of any variety of sugar cane differ greatly 
in successive seasons, one of the most important factors being the 
rainfall; a wet season resulting in juice comparatively poor in 
sucrose, whilst a dry season has the opposite effect. For this reason 
conclusions based on the results obtained in different years cannot 
be drawn. If, however, the theoretical considerations, sketched 
earlier, have been realized we should find that the differences between 
the “ high ” and “low” canes increase with the duration of the 
experiment, that is to say that the mean sucrose content of the 
“ high ” canes rises whilst that for the “ low ” canes falls. Taking 
the first and last terms of the series such a result is seen to have 
been obtained. In 1901 the “high ” canes reaped contained 0-020 
of sucrose per gallon of juice more than the “low” canes, and 
after three years of selection the “ high” canes contained 0-199 of 
of sucrose more than the “low” canes per gallon of juice. In 
other words whilst in 1901 the “high” canes were only 1-05 per 
cent, richer in sucrose than the “ low ” canes, three years chemical 
selection increased this advantage to 10-27 per cent. 
On the other hand it must be remembered that the progress 
has not been uniform, the differences, expressed in pounds of 
sucrose, during the yearsof the experiment being0-020,0-218, 0-093, 
