IMPROVEMENTS IN PRESERVING THE BOTTOMS OF SHIPS OR VESSELS AND OTHER SURFACES FROM THE PREJUDICIAL EFFECTS OF MARINE ANIMALS AND VEGETABLES.
Year: 1863

page_text: LETTERS PATENT to Percy Leslie, M.D., M.R.C.S.Ed., of No. 8,
Windsor Terrace, Eastbourne, in the County of Sussex, for the Inven-
tion of "IMPROVEMENTS IN PRESERVING THE BOTTOMS OF SHIPS OR VESSELS
AND OTHER SURFACES FROM THE PREJUDICIAL EFFECTS OF MARINE ANIMALS AND
VEGETABLES.
Sealed the 18th March 1864, and dated the 1st October 1863.
PROVISIONAL SPECIFICATION left by the said Percy Leslie at the
Office of the Commissioners of Patents, with his Petition, on the
1st October 1863.
PERCY LESLIE, M.D., M.R.C.S., Ed., of No. 8, Windsor Terrace, East-
bourne, in the County of Sussex, do hereby declare the nature of the
Invention for "IMPROVEMENTS IN PRESERVING THE BOTTOMS OF SHIPS OR VESSELS
AND OTHER SURFACES PROM THE PREJUDICIAL EFFECTS OF MARINE ANIMALS AND
VEGETABLES," to be as follows:-
This Invention has for its object improvements in preserving the bottoms
of ships or vessels and other surfaces from the prejudicial effects of marine
animals and vegetables, and consists in first applying to or paying over the
bottoms of ships or vessels and other surfaces a suitable adhesive material
or compound, and then applying thereto poisonous matters, so as to cause
them to adhere by reason of the previously applied adhesive matter or
compound to the bottoms of the ships or vessels or other surfaces.

page_text: It should be stated that it has before been proposed to employ poisonous
matters in combination with adhesive materials mixed together, and then
payed over or applied to the bottoms of ships or vessels and other surfaces,
but I have ascertained that the mixing of the poisonous ingredients with the
adhesive matters does not produce so benefical a result as when the adhesive
matter or compound is first applied.
The adhesive matters. which may be employed in carrying out this Invention
are pitch, tar, resinous and other gums, and other adhesive materials. The
poisonous substances which may be used and applied after the adhesive matter
or compound has been payed over the surfaces are the salts and oxides of
arsenic, baryta, mercury, copper, or other metals, or other poisonous sub-
stances may be used, to none of which materials or ingredients do I make
any claim, they having, as before stated, been proposed to be used for this
purpose.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Percy Leslie in the Great Seal Patent Office on the
1st April 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PERCY
LESLIE, M.D., M.R.C.S.Ed., of 1o. 8, Windsor Terrace, Eastbourne, in the
County of Sussex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the First day of October, in the year of our Lord One
thousand eight hundred and sixty-three, in the twenty-seventh year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Percy Leslie, Her special licence that I, the said Percy Leslie, my
executors, administrators, and assigns, or such others as I, the said Percy
Leslie, 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
PRESERVING THE BOTTOMS OF SHIPS OR VESSELS AND OTHER SURFACES FROM THE
PREJUDICIAL EFFECTS OF MARINE ANIMALS AND VEGETABLES," upon the condition
(amongst others) that I, the said Percy Leslie, my executors or administrators,
by an instrument in writing under my, or their, or one of their hands and

page_text: seals, should particularly describe and ascertain the nature of the said Inven-
tion, 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 Percy Leslie, '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 preserving the bottoms of
ships or vessels and other surfaces from the prejudicial effects of marine animals
and vegetables, and consists in first applying to or paying over the bottoms of
ships or vessels and other surfaces a suitable adhesive material or compound,
and then applying thereto poisonous matters, so as to cause them to adhere by
reason of the previously applied adhesive matter or compound to the bottoms
of the ships or vessels or other surfaces.
It should be stated that it has before been proposed to employ poisonous
matters in combination with adhesive materials mixed together, and then payed
over or applied to the bottoms of ships or vessels and other surfaces, but I have
ascertained that the mixing of the poisonous ingredients with the adhesive
matters does not produce so beneficial a result as when the adhesive matter
or compound is first applied..
The adhesive matters which may be employed in carrying out this Invention
are pitch, tar, resinous and other gums, and other adhesive materials. The
poisonous materials which may be used and applied after the adhesive matter
or compound has been payed over the surfaces are the salts and oxides of
arsenic, baryta, mercury, copper, or other metals, or other poisonous sub-
stances may be used, to none of which materials or ingredients do I make
any claim, they having, as before stated, been proposed to be used for this
purpose.
The way I prefer to proceed, is to cover the surface to be protected from
vegetable and animal growth with a coating of Jeffrey's marine glue, and
while this is still soft, I cause to adhere thereto arsenic, carbonate of baryta,
or other poisonous substance reduced to powder, which is applied to and
pressed against the adhesive matter, which has been, as before stated, previously
payed over or applied to the bottom of a ship or vessel.
I would state that I am aware that inert matters, such as sand, glass,
and others, have before been applied to the bottoms of ships and vessels after
an adhesive material has been payed over the same. I mention this fact, in

page_text: order to state that my Invention is confined to the application of poisonous
matters in the manner above described.
In witness whereof, I, the said Percy Leslie, have hereunto set my hand
and seal, this Twenty-third day of March, in the year of our Lord One
thousand eight hundred and sixty-four.
PERCY LESLIE, M.D., M.R.C.S.Ed, &c. (L.S.)