520 SORGHUM, 



Of the juices analyzed, nineteen gave an average per cent of avail- 

 able sugar of 3.643 plus, while twenty-one gave an average per cent 

 of 6.190 minus, or a total average of the forty equal to 1.51S minus. 



Also, of the syrups analyzed, fourteen gave an average per cent of 

 available sugar of 12.65 plus, while fourteen gave an average per cent 

 of 20.03 minus, or a total average of the twenty-eight equal to 3.68 

 minus. 



It will be observed also that, of the several lots of juice worked, 

 nine gave an aggregate of 3,504 pounds of available sugar, while 

 eleven lots gave an aggregate minus amount of 6,835 pounds; or, in 

 other words, had these juices been all mixed in one lot, and had there 

 been added 3,331 pounds of sugar, it would have been practically im- 

 possible to have recovered a pound of that added or of that present 

 originally in the juice. 



The table of syrups shows that, of tlie twenty-nine analyzed, fifteen 

 gave an aggregate of 1,958 pounds of available sugar, while the re- 

 maining fourteen gave an aggregate of 3,152 pounds minus of avail- 

 able sugar ; or, in other words, had these twenty-nine syrups been 

 thrown together in one lot, and 1,194 pounds of pure sugar added, it 

 would have been impossible to have recovered from this mixture a 

 pound of the sugar added or originally present in the syrup. 



It will also be observed that during the process of manufacture there 

 was lost 17.5 per cent of the sucrose in the juice, 25.4 per cent of the 

 glucose, and 12.5 per cent of the solids. 



It is noticeable that the loss of glucose was considerably greater than 

 that of sucrose, and this may be due to the action of lime, which ef- 

 fects the destruction of glucose, as has been long known to be the case. 

 It is probable that this decrease in tlie relative amount of glucose ac- 

 counts for the fact that the average determinations witli the polari- 

 scope are more nearly those of analysis in the syrups than in the juices, 

 they being only 8 per cent less than the analysis in the case of the 

 syrups, while they are nearly 22 percent less than the results of analy- 

 sis in the case of the juices. 



The character of the canes worked, may also be seen by the low spe- 

 cific gravity averaging 1.058 and the low percentage of syrup which 

 the juice yielded upon evaporation (11), tor, as will be seen by refer- 

 ence to the work of the small mill, the average of twelve lots of juice 

 from canes grown upon the department ground gives 21 per cent of 

 syrup of a greater density, in the juice, or nearly double the amount of 

 that obtained above. The above specific gravity, is that of juice from 

 canes which have not attained their best condition, since, as the analyt- 



