IMPROVE- MENTS IN COMPOSITIONS FOR PREVENTING THE BOTTOMS OF IRON SHIPS FROM FOULING OR CORRODING
Year: 1864

page_text: LETTERS PATENT to Charles Bartley, of No. 4, Lawn Villas, Blackheath,
in the County of Kent, Master Mariner, for the Invention of "IMPROVE-
MENTS IN COMPOSITIONS FOR PREVENTING THE BOTTOMS OF IRON SHIPS FROM
FOULING OR CORRODING."
Sealed the 31st January 1865, and dated the 6th August 1864.
PROVISIONAL SPECIFICATION left by the said Charles Bartley at the
Office of the Commissioners of Patents, with his Petition, on the
6th August 1864.
I, CHARLES BARTLEY, of No. 4, Lawn Villas, Blackheath, in the County
of Kent, Master Mariner, do hereby declare the nature of the Invention
for "IMPROVEMENTS IN COMPOSITIONS FOR PREVENTING THE BOTTOMS OF IRON SHIPS
FROM FOULING OR CORRODING," to be as follows:-
This Invention has for its object improvements in compositions for pre-
venting the bottoms of iron ships from fouling or corroding. For this purpose
I apply to the bottom of the iron ship, in the first place, a coating of the finest
white lead paint; over this I lay a second coating prepared by compounding
one hundredweight of the white lead paint with six pounds of corrosive
sublimate dissolved in methylated spirits of wine, six pounds of powdered gum'
arabic, six pounds of castor oil, and one quart of naphtha; as a finishing, or
third coating, I employ a paint prepared as for the second coating, but with

page_text: eight pounds of corrosive sublimate in place of six, and I also add three
pounds of verdigris and one gallon of fish oil (turtle is best), but common
whale oil may be employed.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Bartley in the Great Seal Patent Office on the
2nd February 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
BARTLEY, of No. 4, Lawn Villas, Blackheath, in the County of Kent, Master
Mariner, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixth day of August, in the year of our Lord One
thousand eight hundred and sixty-four, in the twenty-eighth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Charles Bartley, Her special licence that I, the said Charles Bartley,
my executors, administrators, and assigns, or such others as I, the said
Charles Bartley, 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
COMPOSITIONS FOR PREVENTING THE BOTTOMS OF IRON SHIPS FROM FOULING OR
CORRODING," upon the condition (amongst others) that I, the said Charles
Bartley, 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.
NOW KNOW YE, that I, the said Charles Bartley, 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 fol-
lowing statement thereof, that is to say:
This Invention has for its object improvements in compositions for pre-,
venting the bottoms of iron ships from fouling or corroding, For this purpose,
I apply to the bottom of the iron ship, in the first place, a coating of the
finest white lead paint; over this I lay, when dry, a second coating prepared.

page_text: by compounding one hundredweight of the white lead paint with six pounds
of corrosive sublimate dissolved in methylated spirits of wine, using only as
much spirit as will take up the corrosive sublimate, six pounds of powdered
gum arabic, six pounds of castor oil, which give consistency to the compound,
and one quart of naphtha; this coating being well dried, a further coating as
a finishing, or third coating, is employed, consisting of a paint prepared as for
the second coating, but with a larger proportion of dissolved quicksilver, say
eight pounds of corrosive sublimate in place of six, and I also add three
pounds of verdigris and one gallon of fish oil (turtle is best) but common
whale oil may be employed. These materials are well and intimately mixed
together, and applied as when painting with ordinary paints. I have been
particular in stating the precise proportions of the several ingredients, but
these may be varied.
The peculiarity of my Invention consists in combining a solution of cor-
rosive sublimate with the materials herein described, and applying the same
to the bottoms of iron ships.
In witness whereof, I, the said Charles Bartley, have hereunto set my
hand and seal, this Second day of February, in the year of our Lord,
One thousand eight hundred and sixty-five.
חומ
CHAS. D
DAR
DANILEL (L.B.)