350 Filter and Prepared Charcoal of M. Dumont. 
decoloration and good taste the filter of M. Dumont affords de- 
cided advantages, it offers yet another in the facility of washing aan 
charcoal. 
The old process required repeated mixtures of the coaly nad 
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 instances” 
‘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 
lation 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: 
siens 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 ae he will have reason to congratulate himself ne nt 
_ The se smiplossnest of M. Dumont’s filter, and the good que 
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 ir OT 
process and congratulate him on his success. 
NAB. The syrups must be clarified and perfectly limpid before 
being poured upon the charcoal. This condition is essential 2 
success of the ; Operation. 
* in another number of the Journal de a is the Stine: “the use of 
the filter and animal charcoal to which he (M. Dumont,) gives a particular prepa 
ration, has already enabled several manufac aie to vend domestic sugar of supe 
rior quality to any heretofore 
