194 



SORGHUTVI. 



with the steady decrease of glucose, is the explanation of the equally 

 steady increase of the available sugar, which represents the compara- 

 tive purity of the juices. 



4th. It is stated in the discussion of the table of specific gravities, 

 that the proper stage in the development of sorghum at which to begin 

 the manufacture of sugar, is when the juice has the specific gravity 

 ^1.066, corresponding with 6.6 per cent of available sugar. 



Confirmation of this statement is here furnished by this table, and 

 we further see that this specific gravity (1,066) is attained when the 

 cane reaches what has been named the " 13th stage." 



By reference to the table describing these stages, it appears that the 

 seed of the plant should be quite fully developed and hard. 



By these three indications, eveiy cane grower can judge for himself 

 as to the proper time to work up his sorghum crop, in order that he 

 may obtain satisfactory results. 



At the same time, an analysis of the juice is always valuable, and 

 should be made when practicable. 



GEXERAL AVERAGE FOR THE STAGES, AS DETERMINED FROM THE RESULTS OF THE 

 SAME STAGE FOR ALL VARIETIES OF SORGHUM, IX 1880, AS DETERMINED AT DE- 

 PARTMENT OF AGRICULTURE. 



Stages. 



3 . 



"1 

 a'' 



58 



69 



57 



70 



75 



62 



70 



lU 



266 



217 



166 



170 



1S3 



191 



217 



339 



107 



191 



30 



1 

 2 

 3 



4 

 5 

 6 

 7 

 8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19^ 



1.031 

 1 036 

 1 037 

 1.041 

 1 045 

 1 050 

 1 052 

 1 0.55 

 I 0.58 

 1 061 

 1 (i63 

 1 006 

 1 066 

 1 067 

 1 067 

 1 070 

 1 07M 

 1 069 

 1 080 



4 29 

 4.45 

 4 50 

 4.34 

 4 15 

 3 99 

 3 86 

 3 83 

 3 19 

 2 60 

 2 35 

 2 07 

 2 03 

 1 88 

 1 81 

 1.64 

 1 56 

 1 85 

 8.09 



* This stage (No. 19) was after the cane had ceased growing, late in the season; it was 

 determined frcm canes Nos. 23 and 21 only. 



