73 



Dr. 0. A. Goessmaun l gives the following as the means of bis analyses 

 of the ripe canes : 



Per cent. 



Water 78.94 



Soluble matter 10.22 



Of which sucrose .. 9.25 



Of which cellulose , 8.20 



Of which other substances 2. 64 



Joseph S. Lovering 2 found the following per cent, of sucrose in the 

 juices of sorghum in several experiments, viz, 5.01, 5.57, 7.29. 



Stansbury reports 3 that the juice of sorghum, as examined in France, 

 contains from 10 to 16 per cent, of sugar, a third part of which is un- 

 crystallizable. In respect of the manufacture of sugar, he says : 



In so far as the manufacture of sugar is concerned, in a domestic way, this plant 

 appears to have but little chance of success in a high northern climate, as a large pro- 

 portion of that which is uncrystallizable is not only a loss to the manufacturer, but 

 an obstacle to the extraction of what is crystallizable. It must not be understood, 

 however, that the produce of this plan Ms unprolific or difficult to obtain, but that, 

 all things being equal, its nature renders it more abundant in alcohol or sirup than 

 in sugar. 



Hippolyte Leplay 4 found a percentage of sucrose varying in ripe 

 sorghum from 9.35 to 17.81. 



Leplay 5 shows a total content of both sugars from 7.81 to 11.81 per 

 cent. 



ANALYSES GIVEN BY F. L. STEWART. 6 



Stewart states that sorghum juices show an average density of 11 B., 

 with 18 saccharine matter, nearly all of which is cane sugar. 

 After clarification this specific gravity is reduced to 9.5 B. 1 

 Average results for juice of ripe cane grown on good upland soil are 

 given as follows : l 



Specific gravity 1.085 



Specific gravity of clarified juice 1.070 



Total sugars (per cent.) 17. 00 



Of which nearly all is sucrose. 



Stewart quotes the analyses of Dr. 0. T. Jackson as follows : 



Specific gravity 1.062 



Calculated total sugar (per cent. ) 15. 5 



Obtained sugar (nearly all sucrose), per cent 1C. G 



The figures given in the Agricultural Report, already quoted for Dr. 

 Jackson's analyses, are claimed by Stewart to be erroneous. 



1 Contributions to the Knowledge of the Nature of the Chinese Sugar-Cane, 

 p. 21. 



2 Experiments on the Sorghum Saccharatum, 1857, pp. 7 and 14. 



3 Chinese Sugar-Cane, 1857, p. 10. 



4 Culture du Sorgho sucro, pp. 33 and 34, Toulouse, 1858. 

 6 Manuscript sent to author. 



6 Sorghum and its products, 1867, pp. 171 et seq. 



