Miscellanies. 197 
hours, when in the course of two days the vinegar will be formed, and 
similar to that from wine. 
Clarification.—When vinegar is prepared from alcoholic liquors, 
it is sufficiently clear to be sent immediately to market, but when 
liquids are employed that are not free from foreign matters, the vine- 
gar must be clarified. 
For this purpose it is put into casks placed on blocks in a cellar, 
or other suitable part of the premises, which casks must be filled 
with shavings but without being pressed, and no opening is to be left 
inthe bung. ‘The casks being then filled with the vinegar, it will de- 
posit its impurities on the shavings, and will even by this process ac- 
quire strength. When the shavings have become too foul to answer 
the desired purpose, they must be taken out and washed. The vin- 
egar is also thus deprived of its color. If this is deemed of any 
consequence, color can easily be communicated by a little burnt su- 
gar or a few myrtle berries.— Bull. d’encouragement, Aout, 1831. 
5. Nutritious quality of Gelatine.—In a letter written by M. 
Roulin, and read to the French Academy on the 11th of July, the 
following fact is stated ; in an excursion made by the Author in 1825, 
into the forests which clothe the western declivity of Quindiu (Col- 
umbia,) the journey which ordinarily occupied but two days, but 
which was prolonged to fourteen, completely exhausted the proven- 
der of the company, and after a fruitless search for some alimentary 
substance, one of the guides took it into his head to try to eat his san- 
dals which were made of untanned leather, and very soft from the 
wetness of the woods. He roasted one of them and began to gnaw 
it. M. Roulin and three persons who accompanied him followed 
his example. Having each eaten one third of a sole, which cost 
them not less than two hours mastication, they felt themselves sur- 
prisingly restored and resumed their route. ‘They did not however 
abandon the heart of the palm tree which they had before used, but 
they found this food recruited their strength far less than a bit of 
roast leather. ‘They arrived on the fourteenth day, after having eaten 
five pair of sandals, and a buck skin apron.—Rev. Ency. Jul. 1831. 
CHEMICAL SCIENCE. 
1. Robiquet ona new metallic Dye.—(Jour. de Pharm.)—A stuff 
dyed of a clear bluish grey color was taken to M. Robiquet as able to 
stand the action of every agent without change of tint, a character which 
