AN IMPROVED MODE OF PRESERVING FRUIT
Year: 1872

page_text: LETTERS PATENT to Hector Auguste Dufrené, of No. 10, Rue de la
Fidélité, Paris, in the Republic of France, and 4, South Street,
Finsbury, London, Civil Engineer and Patent Agent, for the Inven-
tion of "AN IMPROVED MODE OF PRESERVING FRUIT."-A communication
from Monsieur Frederic Sacc. residing at Neuchatel.-Switzerland.
PROVISIONAL SPECIFICATION left by the said Hector Auguste Dufrené
at the Office of the Commissioners of Patents, with his Petition, on
the 26th August 1872.
I, HECTOR AUGUSTE DUFRENÉ, of No. 10, Rue de la Fidélité, Paris, in
the Republic of France, and 4, South Street, Finsbury, London, Civil
Engineer and Patent Agent, do hereby declare the nature of the said
Invention for "AN IMPROVED MODE OF PRESERVING FRUIT," to be as follows,
that is to
say:-

page_text: powdered white sugar. Half its weight of alcohol marking 80° of Gay
Lussac's centisimal alcoholimeter is then poured on it. About twelve
hours afterwards the whole is turned upside down, and in about two or
three days the operation is finished. Fruit thus treated may be preserved
in the liquor or withdrawn and dried. When it is to be eaten the fruit 5
is steeped in water containing sugar in the proportion of one-tenth
part by weight. It is then restored to its natural condition. If the
juice be distilled the alcohol and sugar will be reproduced.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Hector Auguste Dufrené in the Great Scal Patent
Office on the 21st February 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HECTOR
AUGUSTE DUFRENÉ, of No. 10, Rue de la Fidélité, Paris, in the Republic
of France, and 4, South Street, Finsbury, London, Civil Engineer and
Patent Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-sixth day of August, in the
year of our Lord One thousand eight hundred and seventy-two, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Hector Auguste Dufrené, Her special
licence that I, the said Hector Auguste Dufrené, my executors, adminis-
trators, and assigns, or such others as I, the said Hector Auguste
Dufrené, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"AN IMPROVED MODE OF PRESERVIing Fruit,” a communication from Monsieur
Frederic Sacc, a person resident at Neuchatel, Switzerland, upon the con-
dition (amongst others) that I, the said Hector Auguste Dufrené, my
executors or administrators, by an instrument in writing under
my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be filed

page_text: in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Hector Auguste Dufrené, do hereby
declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in
and by the following statement, that is to say :—
To carry out the Invention communicated to me, I first place the
fruit to be preserved in a vessel of glass, porcelain, or other suitable
material in alternate layers, with layers of powdered white sugar in the
proportion of about four pounds of fruit to two pounds of sugar. I place
thereon about two pounds of alcohol at eighty degrees Gay Lussac's cen-
tissimal alcoholimeter, and in about twelve hours afterwards the vessel is
turned upside down, and left in that position for the maceration. For
fruit of small size with a thin skin, such as strawberries or raspberries,
maceration during about twenty-four hours is required; for cherries,
plums, apricots, and peaches, forty-eight hours; for pears, apples, and
like fruit, three days maceration is required. It is better for the latter
fruit to remove the skin, and in general to take out the stones or pips.
Fruit may be preserved in this liquid, or drained, and then dried in a
stove or in the open air. It may be caten thus, or after being drained it
may be plunged for about twelve hours in a solution consisting of about
one and three-quarter pints of fresh water to four ounces of white sugar.
It is then merely necessary to drain and dry it.. The solution or the
fruit after steeping to be preserved may be distilled to remove the alcohol
therefrom, and then evaporated to extract the sugar.
In witness whereof, I, the said Hector Auguste Dufrené, have here-
unto set my hand and seal, this Seventeenth day of February,
in the year of our Lord One thousand eight hundred and seventy-
three.