IMPROVEMENTS IN THE TREATMENT OF BONES
Year: 1868

page_text: LETTERS PATENT to John Henry Johnson, of 47, Lincoln's Inn
Fields, in the County of Middlesex, Gentleman, for the Invention"
of "IMPROVEMENTS IN THE TREATMENT OF BONES." -A communication
from abroad by Francois Coignet, of Paris, in the Empire of
France.
Sealed the 30th June 1868, and dated the 3rd February 1868.
PROVISIONAL SPECIFICATION left by the said John Henry Johnson
at the Office of the Commissioners of Patents, with his Petition,
on the 3rd February 1868.
I, JOHN HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the
County of Middlesex, Gentleman, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN THE TREATMENT OF BONES," a com-
munication to me from abroad by Francois Coignet, of Paris, in the
Empire of France, to be as follows:-
In the manufacture of gelatine from bones the bones are subjected
to the action of hydrochloric acid which dissolves the phosphate of lime
and other compounds of lime, and the residual constituents of the
bones are left in a soft pliant condition, which material is employed
for the production of gelatinę as is well understood.

page_text: Now this Invention has for its object the employment of phosphoric
acid as a solvent of the phosphate of lime and of other compounds of
lime contained in bones, by which means they are rendered soft and
pliant suitable for the production of gelatine, and the soluble acid
phosphate of lime resulting therefrom is capable of being advantageously
employed for useful purposes in the arts.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Henry Johnson in the Great Seal Patent
Office on the 1st August 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of Mid-
dlesex, Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Third day of February, in the year of
our Lord One thousand eight hundred and sixty-eight, in the thirty-first
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said John Henry Johnson, Her special licenso - that
I, the said John Henry Johnson, my executors, administrators, and
assigns, or such others as I, the said John Henry Johnson, .
exccutors, administrators, or 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 TREATMENT OF BONES," a communication from
abroad by Francois Coignet, of Paris, in the Empire of France, upon the
condition, (amongst others) that I, the said John Henry Johnson,
my exccutors or administrators, by an instrument in writing under my
hand and seal, should particularly describe and ascertain the nature
of the said Invention, and, in what manner the same was to be per-1
formed, 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 John Henry Johnson, 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 :-

page_text: In the manufacture of gelatine from bones the bones are subjected
to the action of hydrochloric acid which dissolves the phosphate of
lime and other compounds of lime, and the residual constituents of
the bones are left in a soft pliant condition, which material is
employed for the production of gelatine as is well understood.
Now this Invention consists in the employment of phosphoric acid
as a solvent of the phosphate of lime and of other compounds of lime
contained in bones, by which means they are rendered soft and
pliant suitable for the production of gelatine, and the soluble acid
phosphate of lime resulting therefrom is capable of being advantageously
employed for useful purposes in the arts.
In carrying out this Invention the phosphoric acid employed may
be of any desired strength, but I prefer employing an acid in such
state of solution as that the phosphate and other salts of lime dissolved
from and put of the bones shall remain in solution and not be
precipitated and thus become mixed with the residual cartelaginous or
gelatinous materials.
Having now described and particularly ascertained the nature of the
said Invention, and the manner in which the same is or may be used
or carried into effect, I would observe in conclusion that what I
consider to be novel and original, and therefore claim as the Invention
secured to me by the herein-before in part recited Letters Patent is, the
application and use of phosphoric acid to and in the softening of bones
for the manufacture of gelatine or for other useful purposes.
In witness whereof, I, the said John Henry Johnson, have to
this my Specification set my hand and seal, the Thirty-first
day of July. One thousand eight bundred and sixty-eight