101 



nite upon sucrose contained may be substituted percents of the same 

 on the weight of jnice or pounds of the former per 100 gallons of the 

 latter, as exhibited in the annexed scheme : 



The juices treated during the interval of this work remained, so far 

 as could be ascertained, essentially uniform as respected adaptability 

 to filtration, as, indeed, they have done up to present writing ; being 

 referred in this regard, occasionally, to an arbitrarily selected stand- 

 ard by careful weighings of defecated juice, brown coal, and prod- 

 ucts operated upon in observed times on tared paper filters. The 

 analyses of raw juices for those dates which cover this series of deter- 

 minations, as made in the course of diurnal routine work, are presented 

 below. 



While they may serve for general comparison with the like as ob- 

 served in other portions of our tropical cane belt, no relation has yet 

 been noted to exist between the amounts of sucrose, reducing sugars or 

 other known constituents of the juice, and the difficulties exhibited by 

 this in filtration. In the latter regard it is not possible to say if that 

 which has here been experimented upon fairly represents Louisiana's 

 average. It would seem, indeed, to be otherwise, since, in the treat- 

 ment of scums, great difficulty is reported to have been experienced in 

 almost, if not every, other local factory possessing filter-presses, while 

 at this no other process of manufacture was throughout so satisfac- 

 torily performed. 



Average solids. 14.72 



A vi rage sucrose. 11. 68 



Average reducing .sugars (izlucosc) 1.44 



Average coHliru nt of purity (exponent) 79.34 



Plant cane, 127. 5 tons (circa) per acre, blown prostrate September 16. 



