33 



were employed. Thus before frost the chips in the battery were longer 

 under pressure than afterwards, and I may add that the temperature 

 was also higher. These lacls corroborate the statement already made 

 that when once the pmeess of inversion lias commenced it goes easily 

 and rapidly forward under the combined influence of time and an ele- 

 vated temperature. Before such deterioration begins a temperature of 

 even 100 0, can be maintained for an hour without notable injury. 



A further fact which is illustrated by the analyses of the diffusion 

 juices from uninjured canes is that the diminished purity is produced 

 solely by the extraction of gum and chlorophyll, chiefly from the blades 

 and sheaths, and that this injury can be avoided by a proper cleaning of 

 the canes. 



With clean canes and those in which the sucrose is still uninjured no 

 alkaline substance will have to be used in the battery. When, how- 

 ever, deteriorated canes are used, some such application will be neces- 

 sary to save the sucrose from further inversion. As has already been 

 pointed out, finely powdered lime or calcium carbonate evenly distrib- 

 uted over the chips offers the simplest solution of the difficulty. 



CABBONATATED JUICES. 



The ratio of glucose to sucrose (per hundred) was as follows: 



Per cent. 



Before October 1 '26. 28 



After September 30 57. 40 



In both cases we find a marked decrease in the quantity of glucose. 

 This produces a corresponding increase, usually reckoned at twice the 

 quantity of glucose destroyed, in the rendement of crystallized sugar. 



Jf the resulting molasses could be preserved and this can be done, as 

 will be pointed out later this increase in yield could be used without 

 any deleterious effect whatever. The analytical data confirm the opinion 

 already expressed, and agree with the experience of sugar-makers 

 wherever the process has been tried, that the process of carbouatation 

 gives a larger yield of crystallizable sugar than can be obtained by any 

 other known method of defecation. 



SULPHURED JUICES. 



Comparing again the glucose per hundred of sucrose, the following 

 data are obtained: 



Per cent. 



Before October I 30. 86 



A ft. -i -September 30 :U>. 84 



In the first part of the season the treatment with sulphurous acid 

 shows a very slight inversion of the sucrose. This was accomplished by 

 long treatment of the juice with the acid, in the hope that a lighter, 

 colored sirup might be produced. 



In the second half of the season no inversion took place from this 

 source. As I will point out further along, the treatment of the juice at 

 1j;'>;30 No.14 3 



