74 



The reliability of tlie observations of Mr. Stewart may be called in 

 question by the fact that he gives an illustration of a thin section of 

 sorghum cane which shows an abundance of cane sugar crystals of a 

 triangular shape. I will allow Mr. Stewart to describe these crystals 

 in his own words : ! 



An incontrovertible evidence of the preseuco of cane sugar almost exclusively in 

 the juice of sorghum is afforded in the fact that thin sections of the fresh stalk of 

 the plant under the microscope exhibit the cells filled with innumerable minute crystals 

 of pure white sugar, which by their form and other criteria are shown to be cane sugar 

 only. Scarcely a trace of any other substance is found in the cells. This is well repre- 

 sented in the engravings. 



The means of analyses of Early 'Amber cane made by Professor C. A. 

 Goessmann at the Agricultural College of Massachusetts in 1878 are as 

 follows : 2 



Per cent. 



Sucrose 5. 00 



Glucose 6. 35 



Total solids 4 14. 42 



An analysis of the juice of the Amber carie at Berkeley, Gal., was made 

 in 1870 by Professor Hilgard. It gave the following results: 3 



Specific gravity 1. 0605 



Total solids per cent . . 14. 8 



Sucrose *. do 10. 1 



Weber and Scovell 4 give the results of numerous analyses of Amber 

 and Orange sorghum. Following are the figures : 



Composition of juice. 



Weber gives the mean composition of the juice of orange cane as fol- 

 lows : 5 



Per cent. 



Sucrose ^ 9. 77 



Glucose .." 3.00 



. Water 76.58 



' Starch 4.12 



I 0p. ci.,p. 186. 



2 Department of Agriculture, Report 1881 and 1882. 



3 Report California College of Agriculture, 1879, p. 58. 



4 Illinois Agricultural Report, 1880, pp. 425 ct scq. 

 6 Op. cit., p. 427. 



