AN IMPROVED TREATMENT OF PRESERVED EGGS
Year: 1877

page_text: LETTERS PATENT to Alexander Melville Clark, of 53, Chancery Lane, in the
County of Middlesex, Patent Agent, for the Invention of "AN IMPROVED
TREATMENT OF PRESERVED EGGS." A communication from abroad by Jules
Plissart, of Antwerp, in the Kingdom of Belgium.
Sealed the 21st December 1877, and dated the 12th October 1877.
PROVISIONAL SPECIFICATION left by the said Alexander Melville Clark
at the Office of the Commissioners of Patents on the 12th October 1877.
ALEXANDER MELVILLE CLARK, of 53, Chancery Lane, in the County of
Middlesex, Patent Agent. "AN IMPROVED TREATMENT OF PRESERVED EGGS."
[A communication from abroad by Jules Plissart, of Antwerp, in the Kingdom of
Belgium.]
Eggs which have been preserved by means of lime are liable to burst in boiling,
and the object of this Invention is to remove this objection, which renders eggs
preserved by lime unsuitable for some purposes.
According to this Invention the preserved eggs before being put in the market
are placed in vessels of a material capable of resisting the action of acids, such as
earthenware, and provided with cocks near the bottom. The container is filled with
eggs up to within a few inches of the top, and the eggs are then covered with acid,
either diluted or not with water. The vessel is then covered, and the eggs are kept
immersed in the acid for a greater or less time, according to the nature and degree of
concentration of the acid. For example, when vinegar is used, the duration of the
immersion would be from 40 to 45 minutes, and about 2 hours for sulphuric acid
diluted in a hundred times its weight of water. The eggs are then taken out of
the acid, and washed in water in order to remove the deposit on their surface, and
allowed to dry. The acid bath may be employed several times, provided that care
is taken to remove the scum which forms on the surface of the liquid, and also the
sediment that deposits at the bottom of the vessel. The appearance of the bubbles
which rise from the eggs during the operation enables one to judge when the acid
bas become too weak, and required to be strengthened or renewed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Alexander Melville Clark in the Great Seal Patent Office on the
5th April 1878.
ALEXANDER MELVILLE CLARK, of 53, Chancery Lane, in the County of
Middlesex, Patent Agent. "AN IMPROVED TREATMENT OF PRESERVED EGGS."
A communication from abroad by Jules Plissart, of Antwerp, in the Kingdom of
Belgium.
Eggs which have been preserved by means of lime are liable to burst or crack in
boiling, and the object of this Invention is to remove this objection, which renders
such eggs unsuitable for some purposes.
For
According to this Invention the preserved eggs before being put in the market
are placed in earthenware or other vessels capable of resisting the action of acids,
and preferably provided with cocks near the bottom. Each vessel is filled with eggs
to within about four inches from the top, and then filled up with an acid (which
may be diluted or not with water) until the eggs are covered. The vessels are then
covered with a lid, and the eggs are kept immersed in the acid for a greater or less
length of time, according to the nature and degree of concentration of the acid.
example, the duration of the immersion would be from 40 to 45 minutes when
vinegar is used, and about 2 hours when sulphuric acid, diluted in a hundred times
its weight of water, is used. The eggs are then taken out of the acid, and washed
in water in order to remove the deposit on their surface, and allowed to dry. The
acid bath may be employed several times, provided that care is taken after each
immersion to remove the scum which forms on the surface of the liquid, and also
the sediment that deposits at the bottom of the vessel. The appearance of the
bubbles which rise from the eggs during the operation enables one to judge when
the acid has become too weak, and requires to be strengthened or renewed.
Having described the nature of the said Invention, and the manner of performing
the same, I declare that what I claim as the Invention to be protected by the herein-
before in part recited Letters Patent is, the improved treatment of preserved eggs,
which consists in subjecting the said eggs to the action of an acid, and afterwards
washing them in water, as and for the purpose specified.
In witness whereof, I, the said Alexander Melville Clark, have hereunto set
my hand and seal, this Fifth day of April, in the year of our Lord One
thousand eight hundred and seventy-eight.
חג
A. M. CLARK. (L.S.)