DEVELOPMENT OF SUCROSE AND GLUCOSE IX SORGHL"^!. 197 



AVERAGE nESUI.TS OF ANALYSES OF JUICES OF THIRTY-FIVE VARIETIES OF SOR- 



GHVM. 



SuiTose per ee 



Glucose. do.. 



Solii'.s. . • do., 



Available sugar do.. 



Juice — do.. 



Specific gravity of juice 



Number of aualvses 



Average 



16 IS 



1 >0 



3 OJJ 

 11 SO 

 58 .57 



1.0813 

 122 



From this statement it will be seen, that, as an average of all the analv.«es 

 made during those three stages, there was obtained 58.57 percent of the weight 

 of the stripped stalks in juice; that 16 IS per cent of the weight of this juice 

 was cryttallizable cane sugar; and that 11.30 percent of the weight of the juice 

 may be obtained as sugar by the ordinary process of manufacture.* 



By reference to the tables it will also be seen, that of the eight varieties of 



maize examined in 1861, seven of which were of common field and one of 



sweet corn, 



Per cent of cane sugar. 



3 analyses of 3 varieties gave over. l;> 



9 analyses of 7 varieties gave over 12 



22 analyses of 7 varieties gave over. ' . . 11 



29 analyses of 7 varieties gave over 10 



35 analyses of 7 varieties gave over 9 



Of ten varieties of maize grown in 18S0, the following results were obtained: 



Per cent of cane sugar. 



124 analyses of 10 varieties gave over 9 



90 analyses of 10 varieties gave over 10 



59 analyses of 9 varietifs gave over 11 



24 aralyses of 9 a arieties gave over 12 



S analyses of 4 varieties gave over 13 



2 analyses of 1 variety gave over 14 



1 analysis of 1 variety gave over 13 



Explanation of the Stages of GrouiJi, or of Development. 

 In order to record as closely as was possible the development of the 

 plants at the time when they were taken from the field for examina- 

 tion, a series of numbers were made use of, which indicated the sev- 

 eral stages of development. The determination of stages after the 

 fourteenth was, in the case of the sorghum, difficult, aud depended 

 upon the increasing hardness of the seed. Tiiese numbers aud their 

 siguificatious are as follows : 



STAGES OF DEVELOPMENT IN SORGHUM. 



1. About one week before opening of panicle. 



2. Immediately before opening of panicle. 



3. Panicle ju«t appearing. 



4. Panicle two-thirds out. 



*The '■ available sugar "' here stated, is the amount of cane sugar shown by analysis, 

 less the sum of the glucose and solids not sugar: e. g., in this case 16.18 j)er cent less 

 (1.80 per cent — 3 08 per cent) = 11 30 per cent. This mode of computation, as has al- 

 ready been explained, gives a less probable quantity of available sugar than is shown 

 by the method of "exponent,' usually used by sugar boilers. 



