3828 APPENDIX. 
mind, a little exaggerated it sugar producing qualities, and its yield 
per acre. 
* * * * * The sorgho that I examined towards the middle 
of September, had arrived at full maturity, perhaps a little past; it 
had been sown in good season. 
The expressed juice of the sorgho is somewhat more turbid than 
cane juice, but it is clarified by milk of lime as readily as is the latter. 
The green froths which arise from it are nearly analogous to those 
from the juice of the cane. This sap had a density of 1064 ; it reached 
almost 9° Beaumé, and had an acid reaction similar to that of all the 
juices of canes. This property it owes to the acid phosphate of lime 
which it contains. This same salt exists to an equal degree in the 
sugar cane. 
The sap of the sorgho contains a trifle more of salts of potash, acid 
phosphates of lime, and phosphate of magnesia, than any equal quan- 
tity of cane juice—at least I have found it so in the sap of the sorgho 
which I analyzed; it may possibly be that other specimens would 
contain less. 
A litre of the sap of the sugar sorgho contains 7°50 grammes of 
salts of potash, acetate of potash, muriate of potash, and sulphate of 
potash. A gallon of it contains 28-38 grammes, or little more than 
an ounce. 
A litre of the sap gives 2:18 grammes of acid phosphate of lime and 
of phosphate of magnesia. A gallon contains 8°23 grammes. A litre 
has given 0:12 grammes of hydrated silica, mixed with oxide of iron 
and manganese. A gallon contains 0-45 grammes. These matters are 
all in solution in the sap of the sorgho, together with other organic 
matter, such as albumen, vegetable fibrine, chlorophyl, &c. These 
latter substances offer no impediment to the extraction of the sugar 
from the sorgho. 
The sorgho, from a given weight, affords less sap than the sugar 
cane, at least such is indicated by my experiments. It may be that if 
taken when less ripe, the sorgho would give a larger yield of sap. 
From several stalks of sorgho of good quality and fully ripe, I have 
only obtained 42 per cent. of juice by expression, whilst I have readily 
obtained 64 per cent. from the cane by the same process, 
