water is to be added if necessary, then a little acetic acid sufficient
to render the mixture acidulous, and when the whole mass has been well
stirred, and has stood a few minutes, it is to be filtered, and
evaporated at a temperature somewhat below ebullition to the consistence
of a moderately thick syrup. To this extract strong alcohol is to be
gradually added, care being taken to break down any coagulum which may
be formed: and after ebullition and cooling, the alcoholic solution is
to be filtered. The solution must then be evaporated to the consistence
of a thin syrup, and the residue dissolved in distilled water and
filtered anew.