DERIVATION.--An alcoholic liquid obtained by the distillation of the
fermented unmodified juice of fresh grapes, and at least four years old.
PROPERTIES.--A pale amber-colored liquid, having a distinctive odor and
taste and a slightly acid reaction. Its specific gravity should not be
more than 0.941, nor less than 0.925 at 15.6° C. (60° F.),
corresponding, approximately, to an alcoholic strength of 39 to 47 per
cent, by weight, or 46 to 55 per cent, by volume, of absolute alcohol.
DOSE.--Same as that for whisky.