906 COMPARISON OF SOUTHERN CANE AND SORGHUM. 
to be present. This juice contained also 10:4 per cent. of 
cane sugar. 
Three or four joints from the bottom of the same cane 
yielded a juice of the specific gravity 10:5° Beaumé, per- 
fectly sweet in taste, and gave no trace of grape sugar. 
Subacetate of lead gave a light olive-colored precipitate, 
in quantity much less than the similar precipitates of the 
above experiments, less dense, and in bulk only half the 
volume of the mixture. This juice contained 19-4 per cent. 
cane sugar. 
In accordance with these facts, it is the custom in Lou- 
isiana to discard as useless the upper part of the stalk, the 
lower half only being sent to the mill to be pressed. 
Sorghum.—In the juice of different parts of the same 
stalk the same constituents are found, but they bear a dif- 
ferent ratio to each other in the different parts, and when 
the plant is mature, nearly all the saccharine matter which 
it contains throughout is cane sugar. The juice of unripe 
cane resembles very closely that of the upper joints of 
Otaheitan cane above mentioned. If a stalk of fresh ripe 
Chinese cane is divided transversely into three parts each 
of equal length, the upper joints are found to contain not 
only less juice, but relatively a much smaller proportion of 
saccharine matter than the middle or lower portions. Sub- 
acetate of lead gives a very dense and voluminous precip- 
itate, indicating a large proportion of extractive matter. 
Taste unpleasant, somewhat mawkish and bitter. Juice 
not astringent, and does not blacken, readily, polished iron. 
The middle portion of the stalk contains a less amount 
of impurities than the above, and its juice is more trans- 
parent. The pith is crisp and solid, possessing a pure 
sweet taste. The juice contains about 14 per cent. of 
matter precipitated by subacetate of lead, color of expressed 
