An Improved Process for the Preservation and Preparation for Transit of Fish Liver.
Year: 1895

page_text: Date of Application, 29th Nov., 1895-Accepted, 4th Jan., 1896
COMPLETE SPECIFICATION.
An Improved Process for the Preservation and Preparation for
Transit of Fish Liver.
I, CARL MATHIAS ULSTRUP DAHLE, of Stamsünd, Lofoten, in the Kingdom
of Norway, Chemist and Factory Manager, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
This invention relates to the preservation and preparation for transit of fish
liver, and consists in a preliminary absolutely aseptic treatment, drying, subsequently
boiling in oil at atmospheric pressure, and final crushing and packing of the liver
for transit.
It has been ascertained by experiments that every addition of antiseptic
materials, as boracic-acid, salicylic-acid etc. to fish liver, to preserve it for packing
and transit, is unsatisfactory; now premising that the product must be quite clean
and pure from all extraneous additions, it has been substantiated that a reliable
preservation can only be effected by a special and absolutely aseptic treatment of
the liver, and a subsequent boiling in oil, this manner of proceeding having given
the best and most durable product, which, by analysis is also recognised as
absolutely free from such hurtful additions as are always found in the antiseptic
treatment.
The great distinction between the earlier antiseptic and my improved aseptic
method is just the same as between the general signification of the terms antiseptic
and aseptic on the whole.
By antiseptic methods it is sought to kill the hurtful bacilli by materials
influencing them like poison.
The most general of such materials are boracic-acid and salicylic-acid. But
when used often and in considerable quantity they are hurtful to the human
consumer.
By my aseptic method I prepare the object to be preserved, and remove the
hurtful bacilli without employing poisonous means, and only by an absolutely and
philosophically accomplished cleanly treatment, consisting in washing, salting,
drying and boiling.
To carry my invention into effect, I dress fresh fish-liver with sterilized, fresh
water, removing all blood, clots and fibres, after which the liver is dried by warm
air at a temperature of about 30° to 40° Centigrade. The liver is then infused
throughout its substance by a sterilized solution of common salt and destilled
water, of about the strength of 10% of common salt.
After the liver has been wiped, it is boiled thoroughly in oil under atmospheric
pressure, and since this treatment will lead to some destruction of the tissues of
the liver, it is then crushed and ready for packing.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
A process for the preservation and preparation of fish liver for transit, consisting

page_text: of an absolutely aseptic treatment by washing, drying and salting and by subse-
quently boiling in oil at atmospheric pressure, and final crushing and packing of
the liver for transit.
Dated this 20th day of November 1895.
FELL & WILDING,
Agents for the Applicant.