8 SUPPLEMENT. 
This sum of inversion, (42°.9) at temperature 27°, indicates 54.35 
grammes of pure dry sugar to the litre of juice, aad by reference t 
past results it is found that 204.24 grammes of sugar per Htre, ah 
18.82 grammes per 100, or 18.82 per cent. ‘Then, as 204.24: 18.82 
:: 54.35 : 5.008 per cent. of sugar in the juice, and as 100 : 5.08 :: 
69.7 : 3.49 per cent. of sugar in the cane. A second cbservation in 
polariscope, of the juice from the two joints of the saine canes next 
above these, indicated 5.57 per cent. of sugar in the juice, proving thera 
to be richer than those nearer the ground. 
FIRST PRACTICAL EXPERIMENT. 
eens e. Bs The fact of the presence of crystallizable sugar in the 
40°,m. 66. cane being established, I proceeded to cut and grind 
twenty feet of a row, and passed the thirty canes which it produced 
three times through the rollers; about one fourth of the seed had 
changed to a dark glistening brown color, but was still milky; the 
remainder was quite green; ground six to eight of the lower joints, 
which together yielded three and a half gallons of juice, weighing 9° 
Beaume ; neutralized the free acid by adding milk of lime; clarified 
with eggs and boiled it down to 240° Fahrenheit. 
This first experiment looked discouraging and unpromising at every 
step ; its product was a very dark, thick, viscid mass, apparently a 
caput mortuum ; it stood six days without the sign of a crystal, when 
it was placed over a flue and kept warm four days longer, when I 
found a pretty good crop of soft crysta!s, the whole very similar to the 
“ Melada,” obtained from Cuba, but of darker color. 
SECOND EXPERIMENT. 
Oct. 13, About two weeks having elapsed since the first experi- 
Temp. § 4 M- ment, the weather in the interim having been quite warn, 
ee 
8.#. cloudy. temperature at 8 a. Mm. 40° to 52°, and at noon 66° to 
75° Fahrenheit ; and about one half the seed being ripe, I determined 
to try it again, but not being very sanguine of success, no polariscopic 
observation was taken. 
Cut and ground fifty feet of a row, which produced cighty-cight 
canes, and yielded eight gailons of juice, weighing 10° Beaume (cne 
