The Art of Preserving All Kinds of Animal and Vegetable Substances for Several Years, 2nd ed.: A work published by the order of the French minister of the interior, on the report of the Board of arts and manufacturesAppert, Nicolas
Science
The Art of Preserving All Kinds of Animal and Vegetable Substances for Several Years, 2nd ed.: A work published by the order of the French minister of the interior, on the report of the Board of arts and manufactures
Appert, Nicolas
Canned foods
“You take twenty-four [French] pints of grape juice and put one half
of it in a boiler placed on the fire, with the precaution of not
suffering it to boil with too much force. You add fresh juice as that
in the boiler evaporates; you skim it and stir the surface, to add to
the evaporation. When the whole of the juice has been put into the
boiler, you skim it, you take the boiler off the fire, and add some
lye-ashes tied up in a cloth, or whiting (_blanc d’Espagne_, Spanish,
or Troy-white), or chalk reduced to a powder, and first diluted in a
little grape juice, until it no longer effervesces, or, as it were,
boils in the liquor which was shaken.
“By these means, the acid contained in the grape, is separated and
neutralized. In order to try the liquor, put blue paper into it, and
when it does not turn red, then you may be satisfied that the liquor
is no longer acid. Replace the boiler on the fire, after having let
it settle an instant, and put in two whites of beaten eggs. Strain
the liquor through a woollen cloth, fixed on a wooden frame of twelve
or fifteen square inches, so that it occupies little room; then boil
again, and continue the evaporation.
“In order to know whether the syrup be sufficiently condensed, let some
drop from a spoon upon a plate: if the drop falls without spirting or
spreading, or if when divided, the halves run into each other again but
slowly, then you may infer that it has acquired the proper consistency.
“Pour it into an earthen vessel which is not varnished; and when
completely cold, transfer it to vessels of a moderate size, neat, dry,
and well corked; and placed it in the cellar. A bottle once opened,
should not remain long only half filled; and when you make use of it,
take care to hold the neck downwards.
“It is hardly possible to determine precisely, the quantity of chalk or
ashes necessary to be used. Less is required in the South than in the
North, but at all events, more than is necessary will do no harm, since
it remains upon the straining cloth with the other insoluble salts and
the skim.
“If in order to preserve these syrups for a longer time, you were to
carry on the boiling too long, you would find yourself mistaken; for
the syrup would not fail to chrystalize at the bottom of the vessel,
while the body would become thin: on the other hand, if the syrup were
not sufficiently evaporated, it would soon ferment. A housekeeper who
has made these syrups twice, will have learnt the degree of boiling
which ought to be given to the syrup, better than can be taught her by
rule.”
_Syrups and Ratafies._
With this same syrup, I have prepared preserves, confectionary, syrups
and beverages, as well as liqueurs and ratafies of all the kinds of
fruit I have spoken of.
Public-domain text, read in full here on John Shaqi.
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