NORTHERN SUGAR INDUSTRY. 95 



Table No. XIII. — Bagasse heated in closed dottle for two hours with five times its weight 



of water. 



Number. | 



i ft* p+AT* r»"P 



Method of analysis. 



Per cent of sucrose. 



Percent, of other sug- 

 ars. 



Per cent, of sucrose in | 

 bagasse calculated ! 

 from juice. 



Per cent, of other sug- ■ 

 ars in bagasse calcu- 

 lated from juice. 



Deficiency of sucrose, j 

 per cent. i 



Excess of sucrose, 

 per ceut. 



Deficiency of other 

 sugars, per cent. 



Excess of other sugars,; 

 per cent. 



1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 

 10 

 *11 

 12 

 13 

 14 



J uice 



Optical and reducing 



Optical 



9. 75 



5. 95 



6. 05 

 6. 23 

 6.17 

 8. 79 

 6.16 

 5. 93 

 5. 95 



5. 60 

 11. 95 



8. 45 



6. 71 

 8. 55 



2. 33 















Bagasse 



6. 77 

 6. 77 

 6. 77 

 6. 77 





0. 82 

 0. 72 

 0. 54 

 0. 60 









do 



do 













. . do 



do 







... do 



do 









J uice 



Optical and reducing .... 



Pfil'TlinTKTfl.TiatP, 



2. 09 



...... 









RporossPi 



2. 05 



fi. 1ft 



1.45 

 1.45 





0. 06 





0. 60 

 0. 39 



f\rt _ Cnnnpr . 



1. 84 fi. 1ft 



0. 17 

 0.15 

 0. 50 





....do 



....do 



•Juice - . 







6. 10 

 6. 10 







do 











Optical and reducing 



Permanganate 



2.50 

 1. 74 





0. 37 







Bagasse 



8. 08 

 8. 08 

 8. 08 



1.82 





0. 08 





Optical 



1. 37 





..-•-do 



do 







0.47 









Mean 

















0. 61 



0. 30 



0. 08 



0. 49 













Louisiana cane. 



advantage is obtained by prolonging the boiling to two hours. 



ANALYSIS OF CANES AND BA&ASSES IN CLOSED BOTTLES. 



This method of analysis is the only one of the various procedures tried 

 that gives results as near theory as the difficulty of sampling will allow. 

 It is, therefore, worthy of a detailed descr iption. 



THE APPARATUS. 



For polariscopes like the Laurent shadow instrument, taking 16.19 

 gms. sucrose, volume 100 c. c, for a normal charge, the bottle should hold 

 about 300 c. c. It should be strong, of well-annealed glass, and furnished 

 with a patent rubber stopper, such as is commonly used on beer bottles. 



The bottle should have a long neck, plainly marked at 305.4 c.c. This 

 bottle should be of such a size that this mark will fall at the junction 

 . of the lower third of the neck with the upper two-thirds. It is perfectly 

 safe to assume that the volume occupied by the cellulose and insoluble 

 parts of the chips is equal to a volume of water of the same weight. It 

 is also safe to assume, for sorghum canes in general, that the cellulose 

 amounts to 11 per cent, of the total weight of the cane, and, in tropical 

 cane, to 8 or 9 ])er cent. 



For sorghum canes, therefore, the volume occupied by the cellulose of 

 16.19 X 3 grams of cane chips would be 5.4c. c. (16.19 x 3 x 11 =5.4 nearly). 



The total volume, therefore, should be 305.4 in order to make the mix- 

 ture normal for the polariscope. It is best, however, to have the neck 

 of the extraction bottle marked with other volumes, e. at 304.4 c. c. for 

 Southern sugar cane. 



