45 



The apparent percentage of sucrose is as high as in the first molasses, 

 but this is due to the much higher content of water in the latter prod- 

 uct. 



Nevertheless the sugar yield would still be very large to reduce the 

 third molasses to the relative proportions of sucrose and glucose con- 

 vained in the sample from the Calumet plantation, sent by W. J.Thomp- 

 son, the analysis of which will follow. 



In view of this exceeding richness it would seem that the estimated 

 yield of third sugars from the run given in Bulletin 17, viz, 15 pounds 

 per ton, is entirely too low. This yield would doubtless have been fully 

 30 pounds per ton. 



While the chemical control of the diffusion experiments has proved 

 reasonably satisfactory, yet there remain many points of interest which 

 can only be determined by more extended investigations. 



Among these may be mentioned the marked oxidizing power of the 

 bone black on diffusion juices. These juices on reaching the bone-char- 

 filters were as nearly neutral as possible. On issuing from the fil- 

 ters they were intensely acid, and were again treated with lime before 

 a second filtration. Diffusion juices have proved to be much more 

 amenable to treatment for clarification than our first experiments with 

 diffusion applied to sorghum indicated. A simple treatment of the juice 

 with lime, careful skimming and subsequent precipitation of the sedi- 

 ment in settling tanks, appears to be all that is necessary to make a 

 fine article of raw sugar, either with sorghum or sugar canes. 



