AN IMPROVEMENT IN PRESERVING AND DISINFECTING TIMBER AND OTHER SUBSTANCES
Year: 1856

page_text: LETTERS PATENT to Charles Scott Jackson, of 18, Cannon Street, in the
City of London, Lieutenant in the Royal Navy, for the Invention of
"AN IMPROVEMENT IN PRESERVING AND DISINFECTING TIMBER AND OTHER
SUBSTANCES."
Sealed the 29th April 1856, and dated the 19th February 1856.
PROVISIONAL SPECIFICATION left by the said Charles Scott Jackson
at the Office of the Commissioners of Patents, with his Petition, on the
19th February 1856.
I, CHARLES SCOTT JACKSON, of 18, Cannon Street, in the City of London,
Lieutenant in the Royal Navy, do hereby declare the nature of the Invention
for "AN IMPROVEMENT IN PRESERVING AND DISINFECTING TIMBER AND OTHER
SUBSTANCES" to be as follows:-
My improvement consists in applying solutions of the salts of zinc and of the.
salts of iron in combination, for the purpose of preserving timber from decay
and combustion, and of disinfecting timber and vegetable matters, bilge water,
and other substances liable to decay, fire damp, or to decomposition, or requiring
deodorization.
The timber or other substances are to be impregnated or mixed with the
solutions of these or analogous salts by any of the means now in use for
preserving, disinfecting, and deodorizing these substances by other agents.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Scott Jackson in the Great Seal Patent Office
on the 19th August 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
SCOTT JACKSON, of 18-Cannon Street, in the-City-of-London, Lieutenant in
the Royal Navy, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Nineteenth day of February, in the year of our
Lord One thousand eight hundred and fifty-six, in the nineteenth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
mc, the said Charles Scott Jackson, Her special licence that I, the said
Charles Scott Jackson, my executors, administrators, and assigns, or such
others as I, the said Charles Scott Jackson, my executors, administra-
tors, 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 IMPROVEMENT IN PRESERVING AND DISINFECTING
TIMBER AND OTHER SUBSTANCES," upon the condition (amongst others) that I,
the said Charles Scott Jackson, my executors or administrators, by an instru-
ment 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.
NOW KNOW YE, that I, the said Charles Scott Jackson, 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:
My Invention consists in applying solutions of the salts of zinc and of the
salts of iron in combination, for the purpose of preserving timber from decay
and combustion, and of disinfecting timber and vegetable matters, bilge water,
and other substances liable to decay from damp or to decomposition, or
requiring deodorizing.
The timber or other substances are to be inipregnated or mixed with the
solutions of these or analagous salts by any of the means now in use for pre
serving, disinfecting, and deodorizing those substances by other agents.
In carrying out my Invention,-I-prefer-to-employ the chloride.
of zinc and

page_text: perchloride of iron with water. On account of the deliquescent nature of these
salts, I prefer to keep them as concentrated solutions, and then to mix and
dilute them when for use. I prepare a mixed solution of the two salts in the
following manner: four measures of a solution of the chloride of zinc, of
the specific gravity 1-600; three measures of a solution of the perchloride of
iron of the specific gravity 1-384; to each measure of the above mixed solution,
when for use, I add forty measures of water.
I would state that it is not essential that the solution should be mixed
before introducing the same into the timber or other substance. If the salts
are used in succession, I prefer to impregnate first with the solution of
chloride of zinc containing one pound of the salt in seventy pints of water; and
subsequently with the solution of perchloride of iron, containing half a pound
of the salt in seventy pints of water; the timber being allowed to dry before
the second impregnation. For the purpose of deodorizing, I prefer to use the
following proportion to each pint of the mixed solution above mentioned
I add two hundred pints of water; instead of the chloride of zinc, the sulphate
or other soluble salt of zinc may be employed with the perchloride or other
soluble salt of iron; but I believe the chloride of zinc and perchloride of iron
to be the best for the purpose. Although I have stated the proportions I
prefer to employ I do not confine myself thereto.
Having thus described the nature of my said Invention, and in what manner
the same may be performed, I wish it to be understood that I do not claim as
of my Invention the use of the said salts of zinc or of iron separately for the
purposes herein-before described; but I claim as my Invention, the treatment
of timber and other substances with salts of zinc and salts of iron, and thus to
obtain their combined action in preserving and disinfecting timber and other
substances.
In witness whereof, I, the said Charles Scott Jackson, have hereunto set
my hand and seal, this Eighteenth day of August, in the year of our
Lord One thousand eight hundred and fifty-six.
Witness,
HENRY W. CARPMAEL.
CHA. S. JACKSON. (L.S.)