15 



paratus no glucose determinations were made the first run, but since in 

 subsequent work the analyses of the final molasses showed as low per- 

 centage of sucrose without as high glucose content, it is reasonable to 

 assume that the glucose in the molasses in question was derived from 

 that originally present in the juice and was not a result of inversion. 



SECOND STUBBLE EUN. 



On this run the data are more complete than on the previous one. 

 The remarkably good work which had characterized the house in the 

 first run was once or twice slightly interrupted during this run. The 

 most serious mistake made was the neglect of the sulphur machine, by 

 which moist air was admitted freely to the sulphur dioxide after it had 

 passed over the wash water, and, as the conditions were most favorable, 

 there was, in all probability, quite an appreciable amount of sulphuric 

 acid formed. At any rate, the inversion in this run was much greater 

 than in any other, amounting to 4,365.54 pounds of sucrose, being 1.32 

 per cent of sucrose present in raw juice. The analysis of the final mo- 

 lasses gave sucrose, 23.78 per cent; glucose, 32.68, with a purity of 

 30.87. The sucrose in the final molasses of the second stubble run, it 

 will be noticed, is very little in excess of the sucrose of the first stubble, 

 while there is nearly ten per cent less glucose, making the content of 

 total sugar in the last run much lower. 



It would seem from this work that the glucose present in the juice of 

 the cane did not possess the power to restrain the crystallization of 

 sucrose that it is commonly supposed to have. With much more glu- 

 cose in the first run the amount of sucrose is a little less than in the 

 second. Whether this glucose is different from artificially prepared 

 grape sugar in its physical characteristics or whether the restraining 

 power of the latter over crystallization has been greatly overestimated, 

 are questions that this work would naturally suggest, and it is probable 

 that, with the awakening interest of the Louisiana planter in scientific 

 work, both these questions will, before many years, be settled. 



These two runs are noticeable, not so much for the yield of sugar as 

 for the point to which crystallization was carried. Molasses, which be- 

 fore would have been considered worthless, can now, in view of the work 

 done at Calumet, be profitably boiled again for another crop of crystals. 



In boiling for the lower-grade sugars, the massecuite was boiled as 

 stiff as possible without converting it into "taffy." This required a good 

 deal of judgment on the part of the sugar-boiler, and it is to the excel- 

 lent manipulation of the material at this point that the high yield of 

 sugar is due. 



FIRST PLANT RUN. 



This was much the largest run of the season, and had the richest 

 cane. The work of the sugar-house was uniformly excellent, the me- 

 chanical loss between the juice and sirup being small as compared 

 with the stubble cane, and in other parts of the house scarcely notice- 



