IMPROVEMENTS IN THE PREPARATION OF YEAST OR BARK
Year: 1869

page_text: LETTERS PATENT to Alfred Heathorn, of Brayford Wharf, Lincoln, in
the County of Lincoln, for the Invention of "IMPROVEMENTS IN THE
PREPARATION OF YEAST OR BARK."
Sealed the 15th February 1870, and dated the 2nd October 1869.
PROVISIONAL SPECIFICATION left by the said Alfred Heathorn at the
Office of the Commissioners of Patents, with his Petition, on the
2nd October 1869.
I, ALFRED HEATHORN, of Brayford Wharf, Lincoln, in the County of
Lincoln, do hereby declare the nature of the said Invention for "In-
PROVEMENTS IN THE PREPARATION OF YEAST OR BARM," to be as follows:-
This Invention has for its object improvements in the preparation of
yeast or barm.
In order to prepare a yeast or barm in a dry form and in a form in
which it is easy of transport, and in which it may be kept without injury

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Alfred Heathorn in the Great Seal Patent Office on
the 1st April 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALFRED
HBATHORN, of Brayford Wharf, Lincoln, in the County of Lincoln, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Second day of October, in the year
of our Lord One thousand eight hundred and sixty-nine, in the thirty-
third year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Alfred Heathorn, Her special licence
that I, the said Alfred Heathorn, my executors, administrators, and
assigns, or such others as I, the said Alfred Heathorn, 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 "IMPROVEMENTS IN THE
PREPARATION OF YEAST OR BARM," upon the condition (amongst others) that
I, the said Alfred Heathorn, 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 in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.

page_text: NOW KNOW YE, that I, the said Alfred Heathorn, 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 thereof, that is to say:-
This Invention has for its object improvements in the preparation of
yeast or barm.
In order to prepare a yeast or barm in a dry form and in a form in
which it is easy of transport, and in which it may be kept without
injury for a long time, I take brewers' yeast, wash it with water, press
it, and incorporate with 100 parts of the pressed yeast 5 parts of lard
and 3 parts of butter, or lard only may be incorporated with the yeast.
I next take 10 parts of grape sugar, 5 parts of other sugar, such as cane
sugar, 6 parts of ground malt, and 12 parts of olive oil; these I rub
together until they unite. In place of incorporating both grape sugar
and other sugar, such as cane sugar, with the olive oil, either grape
sugar alone or other sugar, such as cane sugar, may be mixed therewith,
the ground malt might also be omitted. I now incorporate the mixture
of sugar and olive oil with the pressed yeast and lard, and after pressing
these substances together put the compound into canvas bags.
Having thus described the nature of my Invention, and the manner of
performing the same, I would have it understood that I do not confine
myself to the exact proportions above given; but that what I claim
is, the preparation of brewers' yeast or barm, substantially as herein
described.
In witness whereof, I, the said Alfred Heathorn, have hereunto set
my hand and seal, this Twenty-sixth day of March, in the year
of our Lord One thousand eight hundred and seventy.