AN IMPROVED PROCESS FOR TREATING BLOOD FOR THE MANUFACTURE OF MANURE
Year: 1874

page_text: LETTERS PATENT to Thomas Myerson, of Saint John's Street, Clerken-
well, in the County of Middlesex, for the Invention of "AN
IMPROVED PROCESS FOR TREATING BLOOD FOR THE MANUFACTURE OF
MANURE."
PROVISIONAL SPECIFICATION left by the said Thomas Myerson at
the Office of the Commissioners of Patents, with his Petition, on
the 30th June 1874.
I, THOMAS MYERSON, of Saint John's Street, Clerkenwell, in the
5 County of Middlesex, do hereby declare the nature of the said Inven-
tion for "AN IMPROVED PROCESS FOR TREATING BLOOD FOR THE MANUfacture of
MANURE," to be as follows:-

page_text: 6 per cent. of albumen, in which is contained about 15 per cent. of
nitrogen, is retained, whereas by the present method of drying blood a
great part of the nitrogen is lost.
The following is an example of my said Invention :-I propose first
to deodorize the blood when necessary by means of turpentine or other
suitable deodorizing chemical. I then mix with the blood about 6 per
cent. (by weight) of chloride of sodium, which will be found to preserve
and at the same time partly expel or extract the liquid matter from the
crassamentum. I then add 3 per cent. (by weight) of alum (by
preference ammonia alum) to the liquid and crassamentum aforesaid,
which can then be dried in the common atmosphere without reducing
the natural proportions of nitrogen contained in the blood, thereby
producing a very valuable manure.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Myerson in the Great Seal Patent Office
on the 30th December 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
MYERSON, of Saint John's Street, Clerkenwell, in the County of
Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her 1
Letters Patent, bearing date the Thirtieth day of June, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
eighth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Thomas Myerson, Her special licence,
that I, the said Thomas Myerson, my executors, administrators, and 1
assigns, or such others as I, the said Thomas Myerson, 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 PROCESS
FOR TREATING BLOOD FOR THE MANUFACTURE OF MANURE," upon the condition
(amongst others) that I, the said Thomas Myerson, my executors or
administrators, by an instrument in writing under my, or their, or one-

page_text: 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.
NOW KNOW YE, that I, the said Thomas Myerson, do hereby
declare the nature of my 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:-
This Invention consists in an improved process for treating blood for
the manufacture of manure, so that the liquid matter containing about
6 per cent. of albumen, in which is contained about 15 per cent. of
nitrogen, is retained, whereas by the present method of drying blood a
great part of the nitrogen is lost.
The following is an example of my said Invention :-I propose first
to deodorize the blood when necessary by means of turpentine or other
suitable deodorizing chemical. I then mix with the blood about 6 per
cent. (by weight) of chloride of sodium, which will be found to preserve
and at the same time partly expel or extract the liquid matter from the
crassamentum. I then add 3 per cent. (by weight) of alum (by
preference ammonia alum) to the liquid and crassamentum aforesaid,
which can then be dried in the common atmosphere without reducing
the natural proportions of nitrogen contained in the blood, thereby
producing a very valuable manure.
And in order to explain my said Invention more fully I will now
proceed to describe the best means I am acquainted with for carrying
the same into practical effect, as follows:-
The blood when taken from the beast is allowed to congeal, after
which the serum may be strained off to obtain the albumen, or it may
be retained. The refuse from the serum, together with the clot or the
serum and the clot, I proceed to treat as follows:-When it is desired to
dry the blood simply in the common atmosphere I mix with it from 3 to
6 per cent., more or less, of chloride of sodium, and allow it to rest for
a sufficient time in order to thoroughly penetrate the clot to prevent
mildew or decomposition during the time of drying. I then add alum
(by preference ammonia alum) at intervals, first about 4 per cent., and
at the expiration of 12 or 24 hours another 2 per cent., and in about 6

page_text: hours after about 1 per cent., more or less, making a total of about 7
per cent. by weight of alum to the clot. The chloride of sodium may
be added to the blood either separately, as above stated, or it may be
first mixed with the alum and then added, but I prefer the former
method, as by mixing in parts the blood is more thoroughly coagulated,
the liquid matter is absorbed and prevented from running away while
drying, the adhesive or gelatinous properties of the blood are destroyed,
and it is easily separated. I would here remark that the clot should be
spread out thinly on wire or perforated shelves so as to allow the air to
pass through it when it is required to dry it thoroughly.
When the blood is dried by artificial means, such as a moderate heat
or a blast, I prefer to dispense with the use of chloride of sodium
entirely, as in this case the blood will not be liable to mildew or decom-
pose, and I simply add the alum in the manner above described.
I do not intend to limit, myself to the precise proportions or time or
number of times of mixing above described, as the same will vary
according to the amount of liquid matter contained in the clot, but I
have found in most cases that the above proportions and time answer
well.
Having now described the nature and object of my said Invention,
and the means whereby it may be effected, I would remark in conclusion
that what I claim as my Invention is the dessication of the blood by
means of or in association with the chemical salts, herein-before set
forth, or analogous materials furnishing the same elements, substantially
as herein described.
In witness whereof, I, the said Thomas Myerson, have hereunto
set my hand and seal, this Twenty-ninth day of December, in the
year of our Lord One thousand eight hundred and seventy-
four.