502 SORGHUM. 



In 1881, the increase for each .001 specific gravity was, in the aver- 

 age results for specific gravity, between 1052 and 1082 : 



Per pent. 



Sucrose 305 



Solids 013 



Available sugar 354 



Glucose. .minus.. 062 



Number of analyses, 438. 



The general average for the years 1879, 1880, and 1881, specific 

 gravity between 1048 and 1080, Avas for each increase of .001 specific 

 gravity: 



Per cent. 



Sucrose 238 



Solids 028 



Available sugar 2(i2 



Glucose minus.. .052 



Number of analyses, 2,900. 



For changes in specific gravity in successive stages of development, 

 each increase of .001 specific gravity corresjwnded to the following re- 

 sults : 



From these it will appear that the sorghum juices, after they have 

 reached a specific gravity of about 1050, increase gradually and M'ith. 

 great regularity in saccharine strength and in available sugar until a 

 specific gravity of 1080 to 1082 is attained, and that this increase is 

 fully, upon the average, 0.3 2^er cent of the weight of tlie juice for 

 each .001 increase in specific gravity, or an average increase between 

 1050 and 1082 of 9.6 per cent of the weight of the juice in available 

 sugar. 



The practical importance of this fact, which appears to be demon- 

 strated by the very numerous analyses made during the past three 

 years, can hardly be too strongly emphasized. 



By reference, then, to the table given on page 493, the farmer may, 

 by simply taking the specific gravity of his sorgluim juice, readily es- 

 timate the approximate value of the ci'op for the production of sugar 

 or syrup. 



