350 Filter and Prepared Charcoal of M. Dumont. 



decoloration and good laste the filter of M. Dumont affords de- 

 cided advantages, it offers yet another in the facility of washing the 

 charcoal. 



The old process required repeated mixtures of the coaly residuum 

 with large quantities of water to separate the sugar which it retained, 

 and those washings required expensive evaporation. This disagree- 

 able and tedious labor is almost done away with by M. Dumont ; for 

 without deranging the apparatus, the addition of water promptly re- 

 moved all the sugar, and, what is still more valuable^ at the com- 

 mencement of its action, a considerable portion of syrup is obtained 

 of a density almost equal to that which flows in the first instance. 



The simplicity and rapidity of this washing will be especially ap- 

 preciated in large manufactories. We need not dwell upon the im- 

 portance of M. D.'s process in point of economy ; those to whom the 

 manipulation of sugar is familiar, will readily comprehend it. M. D. 

 estimates the results obtained by his process as four times greater 

 than by the old, and assures us that his decolorized syrups are en- 

 hanced thirty per cent, in value. Were it even necessary to abate 

 somewhat of these valuations, it is not the less certain that his pro- 

 cess will secure great benefits to those who employ it. Already some 

 pharmaciens have adopted it and it is used by confectioners and dis- 

 tillers. We know that a director of one of the largest sugar re- 

 fineries in Paris, has commenced its trial, and every thing induces 

 the belief that he will have reason to congratulate himself upon the 

 experiment.* 



The ready employment of M. Dumont's filter, and the good qual- 

 ity of the syrups obtained whether for consumption in that state or 

 for crystallization ; the simplicity and promptitude of the washing in- 

 duce us to believe that his process will effect marked changes in the 

 arts connected with the manufacture and refining of sugar. 



We think M. Dumont has rendered great service to the arts, and 

 we propose that the society thank him for calling their attention to his 

 process and congratulate him on his success. 



N. B. The syrups must be clarified and perfectly limpid before 

 being poured upon the charcoal. This condition is essential to the 

 success of the operation. 



* In another number of the Journal de Pharmacie is the following: "the use of 

 the filter and animal charcoal to which he (M. Dumont,) gives a particular prepa- 

 ration, has already enabled several manufacturers to vend domestic sugar of supe- 

 rior quality to any heretofore made." 



