THE MANUFACTURE OF AN EXTRACT OF FISH, CRUSTACEA, AND SHELL-FISH
Year: 1880

page_text: LETTERS PATENT to William Clark, of 53, Chancery Lane, in the County of
Middlesex, Patent Agent, for. an Invention of "THE MANUFACTURE OF AN
EXTRACT OF FISH, CRUSTACEA, AND SHELL-FISH." A communication from
abroad by Jules Jouanique, of Marseilles, France.
PROVISIONAL SPECIFICATION left by the said William Clark at. the Office
of the Commissioners of Patents on the 1st June 1880.
WILLIAM CLARK, of 53, Chancery Lane, in the County of Middlesex, Patent
Agent. "THE MANUFACTURE OF AN EXTRACT OF FISH, CRUSTACEA, AND
SHELL-FISH." [A communication from abroad by Jules Jouanique, of Marseilles,
France.]
This Invention relates to the manufacture of an extract of fish, crustacea, and
shell fish, forming a new alimentary product. The process of manufacture is as
follows:
I take a certain quantity of fish, selecting certain kinds, according to the qualities
I desire the extract to have. The fish is first cleaned and then boiled in a sufficient
quantity of water, and when sufficiently cooked the water is poured off and the
fish subjected to considerable pressure. The water thereby expressed from the fish is
then added to that in which the fish were boiled, and the whole is then boiled down
or concentrated until more or less completely reduced, according to the quality of
the fish and the degree of concentration to be given to the extract. In short, so
long as any water remains it is evaporated, the oily or fatty scum which forms on
the surface being removed from time to time. The extract thus produced is put
up in hermetically sealed boxes or vessels to preserve it for use. When crustacea
are used the shells are first removed and the flesh treated as above described, and
similarly in the case of shell-fisb. The concentration of the juices may be
performed in vacuo or otherwise.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Clark in the Great Seal Patent Office on the 1st December
1880.
WILLIAM CLARK, of 53, Chancery Lane, in the County of Middlesex, Patent
Agent. THE MANUFACTURE OF AN EXTRACT OF FISH, CRUSTACEA, AND
SHELL-FISH." A communication from abroad by Jules Jouanique, of Marseilles,
France.
This Invention relates to the manufacture of an extract of fish, crustacea, and
shell-fish, forming a new alimentary product.
The process of manufacture is as follows:-I take a certain "quantity of fish,
selecting those kinds whose qualities it is desired that the extract should possess,
and after first cleaning the fish I boil them in a suitable quantity of water, and
when sufficiently cooked pour off the water, and subject the fish to considerable
pressure. I then add the water and juices thus expressed from the fish to that in
which the fish were boiled, and boil the whole down or concentrate it more or less
completely, according to the quality of the fish and the degree of concentration to
be given to the extract. In short, so long as any water remains the evaporation
is continued, the oily or fatty scum which collects on the surface being skimmed
off from time to time. The extract thus produced is put up in hermetically sealed
boxes or tins to preserve it for future use." When crustacea are treated the shells
are first removed, and the flesh submitted to the process above described, and
similarly in the case of shell-fish. Any known means for pressing the fish after
boiling may be adopted, and the cooking and concentration of the juices may be
effected by direct heat or by steam, and either in vacuo or not, as found most
desirable, according to the kind of fish, crustacea, or shell fish to be treated.
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
hereinbefore in part recited Letters Patent is,―
1st. The manufacture of an extract of fish, crustacea, and shell-fish by boiling
the flesh thereof in water, then expressing therefrom the juices, then adding the
latter to the liquor used for boiling, and finally boiling down or concentrating the
liquor and juices, as and for the purpose specified.
2nd. The concentration of the juices of fish, crustacea, or shell-fish by any suitable
means, either over an open fire, or by steam, in vacuo or otherwise, and preserving
the extract thus obtained for use in hermetically sealed boxes or vessels, as
described.
In witness whereof, I, the said William Clark, have hereunto set my hand
and sool this First day of December A.D. 1880