Year: 1808

page_text: LONDON:
PRINTED BY GEORGE E. EYRE AND WILLIAM SPOTTISWOODE
PRINTERS TO THE QUEEN'S MOST EXCELLENT MAJESTY:
PUBLISHED AT THE GREAT SEAL PATENT OFFICE,
25, SOUTHAMPTON BUILDINGS, HOLBORN.

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
MOORE NOBLE, of Birmingham, in the County of Warwick, Surgeon, do send
greeting.
WHEREAS His most Excellent Majesty King George the Third, by His
Royal Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Twenty-third day of January, in the forty-eighth year of His
reign, did give and grant unto me, the said Edward Moore Noble, my exors,
admiors, and assigns, His special licence, full power, sole privilego and autho-
rity, that I, the said Edward Moore Noble, my exors, adiñors, and assigns,
during the term of years therein expressed, should and lawfully might make,
use, exercise, and vend, within that part of the United Kingdom of Great
Britain and Ireland, called England, the Dominion of Wales, and the Town
of Berwick-upon-Tweed, my "NEW METHOD OF MAKING CARBONATE OF LEAD,
COMMONLY CALLED WHITE LEAD;" in which said Letters Patent there is con-
tained a proviso, obliging me, the said Edward Moore Noble, under my hand
and seal, to cause a particular description of the nature of my said Invention,
and in what manner the same is to be performed, to be inrolled in His
Majesty's High Court of Chancery within six calendar months next and
immediately after the date of the said recited Letters Patent, as in and by
the same, reference being thereunto had, will more fully and at large appear.

page_text: NOW KNOW YE, that I, the said Edward Moore Noble, in compliance
with and in performance of the aforesaid proviso in the said in part recited
Letters Patent contained, do, by this present instrument in writing, declare
that the nature of my said Invention, and the manner in which I perform the
same, is as follows:-
I take lead, which I prefer to be in thin plates or small picces, and place it
in a vessel that has a small communication with the atmosphere; to this I
add so much acetous acid, or vinegar, or a solution of acetite of lead, or of
both, that the lead may not be wholly but only partly immersed in the liquor.
I then transfer into the vessel a mixture of carbonic acid gas and oxygen gas,
or of carbonic acid gass and atmospheric air, or a mixture of all three, and I
frequently agitate the mixture in order to make the liquor pass over and act
upon the lead, and that the carbonate of lead, when formed, may be removed
from the surface of the metal, and a fresh surface thereof may be exposed; or,
instead of lead in a metallic state, I take lytharge, or an oxyde of lead, contain-
ing the proportion of oxygen that will enable it to unite with acetous acid, and
to this I add either acctous acid, or a solution. of acetite of lead, or both acetous
acid and acetite of lead, taking care that the quantity of oxyde of lead be
At least sufficient to saturate the acid; I then transmit into, through, or
upon the mixture, carbonic acid gas, either in a state of purity, or mixed withi
atmospheric air, with oxygen gas, or with any other gas that will not injure the
process; and I find it expedient frequently to agitate the mixture to facilitate
the union of the carbonic acid with the oxyde of lead. Whichever process I
make use of, a white substance is produced, which is the carbonate of lead,
commonly called white lead or cerusse, but the degree of whiteness will depend
upon the quality of the materials employed, upon the operation being well or
imperfectly performed, and upon its being more or less free from mixture with
other substances. When the carbonate of lead is formed, I separate it from.
tlic mixture, and if I intend it to be mixed with oil I dry it. I sometimes
find it expedient to wash the carbonate of lead with water previously to its
being dried.
In witness whereof, I, the said Edward Moore Noble, have hereunto set
my hand and seal, the Fourteenth day of July, in the year of our Lord
One thousand eight hundred and eight
E. M. NOBLE. (L.S.)

page_text: AND BE IT REMEMBERED, that on the Fourteenth day of July, in
the year of our Lord 1808, the aforesaid Edward Moore Noble came before
our said Lord the King in His Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained and specified, in form
above written. And also the Specification aforesaid was stampt according
to the tenor of the Statute made for that purpose.