358 WISCONSIN STATE AGRICULTURAL SOCIETY. 
the first two and the last, than between the juice of the Sugar 
Cane reared in different climates. 
Dr. Evans tells us that Sugar Cane juice, when recently ex¬ 
pressed, is opaque, frothy, and of a yellowish green, or some¬ 
times grayish green color. It has an aromatic and sweet taste, 
a balsamic odor, and produces a slightly acid reaction on litmus 
paper. In the latter respect it offers considerable variation.— 
Its specific gravity is said to vary from 1.046 to 1.110, or from 
7° to 15°, Baume. These must, however, be considered as its 
extreme limits, "which are rarely observed. He had never seen 
it in any country of a density below 10°, nor higher than 13°, 
the temperature being 80° Fahrenheit. Its specific gravity usu¬ 
ally fluctuates between 1.070 and 1.090. The difference in 
density depends upon many causes, as the age of the cane, the 
climate, the soil, the season, the temperature of the atmos¬ 
phere, etc. 
The Cane juice consists of two parts easily separated from 
each other by filtration, the one being a perfectly transparent 
fluid, of a pale yellow color ; the other a dark green fecula, 
which remains upon the filter. The latter, upon examination 
under the microscope, is seen to be formed of a green globular 
matter (chlorophylle,) portions of woody fibre, cellulose, in a 
state of the broken up wall of the cells, and a few shreds of 
coagulated fibrine. By the application of heat and some de¬ 
fecator, these substances separate readily from the juice, and 
then constitute the scum of the clarifiers. This scum has been 
analysed, and consists of cerosin, or wax, 7.5, green matter, 
1.3, albumen and woody matter, 3.4, biphosphate of lime, .5, 
silica, 2.1, water 84.2. 
The transparent liquid which remains when the above matters 
have been separated by filtration and defecation, consists of 
water and sugar, and a small quantity of dextrine, varying, 
probably from one to four parts in a thousand in ripe and 
healthy cane ; also soluble compounds of proteine, saline mat¬ 
ter, and a coloring principle distinct from the green matter 
mentioned above, soluble in water. 
