A BLACK PAINT, COMPOSED CHIEFLY OF EARTHY ANDMINERAL SUBSTANCES, WHICH WILL BE BENEFICIAL TO HIS MAJESTY'S NAVY AND THE SHIPPING INTEREST AT LARGE, BEING PARTICULARLY CALCULATED TO PRESERVE WOOD, AND PREVENT RUST IN IRON, AND MAY BE APPLIED TO ALL THE PURPOSES FOR WHICH PAINT IN GENERAL IS
Year: 1806

page_text: _ TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ISAIAH
BIBT, of Plymouth Dock, in the County of Devon, Gentleman, send
greeting.
WHEREAS His most Excellent Majesty King George the Third, by His
Letters Patent under the Great Seal of the United Kingdom of Great Britain
and Ireland, bearing date at Westminster, the Eighteenth day of September,
in. the forty-sixth year of His reign, did give and grant unto me, the said
Isaiah Birt, my executors, administrators, and assigns,. His special licence, full
power, sole priviledge and authority, that I, the said Isaiah Birt, my executors,
administrators, and assigns, and every of them, by. myself and themselves or
by my and their deputy or deputies, servants or agents, or such others as I, '
the said Isaiah Birt, my executors, admors, or assigns, should at any time
agree with, and no others, from time to time and at all times thereafter during
the term of years therein expressed, should and lawfully might make, use,
exercise, and vend, within that part of the said United Kingdom of Great
Britain and Ireland called England, the Dominion of Wales, and Town of
Berwick-upon-Tweed, and also in all His Majesty's Colonies and Plantations
abroad, my Invention of "A BLACK PAINT, COMPOSED CHIEFLY OF EARTHY AND
MINERAL SUBSTANCES, WHICH WILL BE BENEFICIAL TO HIS MAJESTY'S NAVY AND
THE SHIPPING INTEREST AT LARGE, BEING PARTICULARLY CALCULATED TO PRESERVE
WOOD, AND PREVENT RUST IN IRON, AND MAY BE APPLIED TO ALL THE PURPOSES FOR
WHICH PAINT IN GENERAL IS USED;" in which said Letters Patent is contained a

page_text: proviso, that if I, the said Isaiah Birt, should not particularly describe and
ascertain the nature of the said Invention, and in what manner the same is
to be performed, by an instrument in writing under my hand and seal, and
cause the same to be inrolled in His Majesty's High Court of Chancery
within one calendar month next and immediately after the date of the said
recited Letters Patent, that then the said Letters Patent and all liberties
and advantages whatsoever thereby granted should utterly cease, determine,
and become void, any thing therein-before contained to the contrary thereof
in anywise notwithstanding, as by the said in part recited Letters Patent,
reference being thereunto had, will fully and at large appear.
NOW KNOW YE, that I, the said Isaiah Birt, in compliance with the
said proviso, do hereby describe and ascertain the nature of my said Invention,
and in what manner the same is to be performed, in manner following, that is
to say:
My Invention consists in uniting, in proper quantities, calcarcous or
agillaceous earth with lamp black or ivory black, and after the various
experiments which I have made to bring it to perfection, I perform my
said Invention as follows:-
Take of the blueish marly stone found in copper, tin, and lead mines
(principally in the copper mines), and of iron stone, and of fine blue marle
or slate, and of under earth, equal quantities, and reduce them by grinding or
pounding to a very fine powder. To any given quantity of the above-
mentioned materials, when put together, add one-eighth of their weight of
lamp black, so that there will be seven-eighths of the earthy or mineral
substances and one-eighth of the lamp black. This produces my Invention
of a superior black paint for wood, iron, canvas, or any other thing for which
paint is used; but for the purpose of using such paint it must be ground (in
the usual manner of grinding colours) with oil, as commonly done by
colourmen or painters (their boiled oil I much prefer), and the same when
mixed with oil, and made up as other paint in general is, may be used
with the brush, as in common practice. I also perform my said Invention
by mixing in equal quantities any three, or any two of the above-mentioned
articles of blueish marly stone, iron stone, fine blue marle or slate, and
under earth, together, when ground or pounded to powder as aforesaid,
and adding one-cighth of their weight of lamp black, as before described;
and also I perform it by mixing either one of such articles, when ground or
pounded to powder as aforesaid, with one-eighth of its weight of lamp black,
ps beforo described. I also perform my said Invention by using ivory black
jnstead of lamp black, but for general purposes I prefer the lamp black;

page_text: under earth I have procured from the coal works in the Forest of Dean, by
which name it is well known amongst the colliers there: it is probable that
other collieries produce it also. For the blueish marly stone I have not been
able to obtain any name, but it is produced in abundance in the mining parts
of Devon and Cornwall.
Be it remembered, that my said new Invention consists only in the uniting
the before-mentioned articles of blueish marly stone, iron stone, fine blue marle
or slate, and under earth, with lamp black or ivory black, and that I state one-
eighth of lamp black because that is the quantity I generally use, and which
in all the trials I have made has not ever failed to produce the effect, but I
have on some occasions used as much as one-fifth, and on others as little as one-
sixteenth.
In witness whereof, I, the said Isaiah Birt, have hereunto set my hand
and seal, the Fourteenth day of October, in the year of our Lord One
thousand eight hundred and six.
Signed, sealed, and delivered by the within-
named Isaiah Birt (being first duly
stamped), in the presence of,
ISALAH (Ls.) BIRT.
WGALE. Bodford Street, Bedford Row.
SAM GALE,
Do.
AND BE IT REMEMBERED, that on the Fourteenth day of October, in
the forty-sixth year of the reign of His Majesty King George the Third, the
said Isaiah Birt came before our said Lord the King in His Chancery, and
acknowledged the instrument aforesaid, and all and every thing therein
contained and specified, in form above written. And also the instrument
aforesaid was stamped according to the tenor of the Statute made in the
forty-fourth year of His said Majesty's reign.
Inrolled the Fourteenth day of October, in the year of our Lord One
thousand eight hundred and six.