22 



high heat, being merely brought to a boil and skimmed once or twice 

 Still the inversion was appreciable, and when the operation is prolonged 

 it is easy to see that a very considerable inversion might result. This 

 operation will be entirely dispensed with at Des Lignes next season. 



EFFECT OF HEATING SULPHURED JUICES BEFORE THE ADDITION OF 



LIME. 



As I have previously indicated, the sulphured juice was taken as a 

 starting point in the control work, as this was the first point where an 

 accurate gauging and sampling of the juice could be obtained. Losses 

 prior to this point, therefore, do not appear in the above showing. The 

 operation of sulphuring was carefully watched, however, and means 

 taken to insure a pretty thorough washing of the sulphur fumes. 1 I 

 do not think the loss was very large in this operation. 



A few analyses were made to determine the extent of inversion pro- 

 duced by healing the sulphured juice before the addition of lime. The 

 results are given in the following table. The samples are strictly com- 

 parable, being taken from the same clarifierful of juice, the first while 

 cold, and the second after heating the juice to a boil before the addi- 

 tion of lime. 



Table showing effect of heating sulphured juice before the addition of lime. 



The inversion is very slight, being only .12 per cent, of the sugar 

 present, but as it seems just as effective to add the lime before heating, 



1 The method of washing sulphur fumes employed at Des Lignes was described by 

 Mr. Shattuck in a meeting of the Cane Growers' Association, and can be found on 

 page 236, vol. I, of the Louisiana Planter. 



