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of a newly discovered vegetable add. 
when first they have arrived at maturity. After sufficient 
bruising in a Wedge wood mortar, they are to be subjected 
to strong pressure in a linen bag. If collected at the most 
favourable time, they will afford nearly one half their 
weight of juice, s. g. 1077. This after due subsidence is to 
be strained, and mixed with filtered solution of acetate of 
lead. The precipitate is to be collected on a filter, and in 
order to separate any uncombined colouring matter, it should 
be washed with cold water. A very large quantity of boiling 
water is to be poured on the filter, and allowed to pass through 
the precipitate into different glass jars. After some hours, 
the washings become opaque, and at length deposit crystals 
of singular lustre and beauty. Those which have been 
formed in the colourless washings are to be alone retained ; 
they are to be separated by the filter, dried in the air, and 
preserved for a farther process. 
The original mass remaining on the filter, from which the 
crystals have been obtained, being now hard and brittle, is 
incapable of affording any more, without undergoing a new 
operation. It is to be boiled for half an hour with a little 
more dilute sulphuric acid than is sufficient to decompose the 
salt ; when cold it is to be filtered. The filtered liquor is to 
be mixed a second time with acetate of lead; the precipitate 
washed, as before, with boiling water, and the crystals selected 
from the colourless washings only. The remaining mass 
again grown hard, is to undergo the process of decomposition 
with sulphuric acid, combination with lead, and the formation 
of crystals : and after all, it will be found that the crystals 
of all the processes will be inconsiderable when collected. 
The whole of the crystalline product being dried, is to be 
