REPORT OF THE CHEMIST. 



51 



For purpose of further comparison the followiug analyses of sugar 

 canes and juice of the sugar-cane grown in Madras, India, are given 

 below. The canes were divided into ui)per, middle, and lower thirds, 

 each third being 2 feet in length, except the lower thirds of the selected 

 canes, which were 3 feet in length. 



ANALYSIS OF EXPKESSED JUICE. 



Chbm. Cest. Blatt., February, 1879. 



For more clearly presenting the facts developed by the examinations 

 of the four kinds of sorghum, the following chart represents graphically 

 the foregoing results: 



It will be observed how closely the Early Amber and Liberian corres- 

 pond in their development, being almost identical, and yet being clearly 

 distinct varieties. It will also be seen that while these two varieties 

 attain a content of sugar in their juices equal to the average content in 

 the juice of sugar-cane by the middle of August, the Chinese does not 

 reach this condition until the last of September, while the Honduras 

 does not reach this point until the middle of October. 

 , It will be seen also that after having attained approximately the max- 

 imum content of sugar, this condition is maintained for a long period, 

 affording ample time to work up the crop. 



It is doubtless true that had the season been longer it would have 

 been found that the Chinese and Honduras, having once attained this 

 full development of sugar, would also have retained it ; but, as is seen 

 by the chart, the heavy frosts and subsequent warm weather which 

 hai)pened about November 24 caused a rapid diminution of sucrose in 

 each variety, and a corresponding increase in glucose. 



The converse of what is found true of the sucrose is clearly shown as 

 to the development of the glucose, and it is seen that a minimum quan- 

 tity once attained is continued a long time, and that this minimum is 

 quite as low as the average amount found present in the sugar-canes. 



It is obvious that the results depicted upon the chart are not to be 

 taken as entirely exact, but the general fact represented is without doubt 

 true, and with a still larger number of observations the apiiroach to true 

 curves would be found nearer than here represented. 



The line representing the average per cent, of sucrose in sugar-beets 



