NEW PROCESS FOR CALCINING OF EXTRACTING THE SULPHUR FROM POOR COPPER AND LEAD ORES, AND RENDERING. SUCH POOR ORES AS WERE BEFORE UNSALEABLE AS VALUABLE AND SALEABLE AS ANY ORES
Year: 1779

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, greeting.
WHEREAS His present most Excellent Majesty King George the Fourth,
by His Letters Patent under the Great Seal of Great Britain, bearing date
at Westminster the Twenty-seventh day of March, in the nineteenth year
of His reign, did give and grant unto me, WILLIAM ROE, of Liverpool, in the
County of Lancaster, Copper Refiner, his especial licence, full power, sole.
priviledge and authority that I, the said William Roe, my executors, adminis-
trators, and assigns; and every of us, during the term of years therein expressed,
should and lawfully might use and exercise my "NEW PROCESS FOR CALCINING
OF EXTRACTING THE SULPHUR FROM POOR COPPER AND LEAD ORES, AND RENDERING.
SUCH POOR ORES AS WERE BEFORE UNSALEABLE AS VALUABLE AND SALEABLE AS ANY
ORES," within that part of the Kingdom of Great Britain called England,
the Dominion of Wales, and Town of Berwick-upon-Tweed, in such
manner as to me, my executors, admors, and assigns, or any of us, should
in our discretions seem meet; in which said Letters Patent is contained a
proviso that if I, the said William Roe, should not particularly describe and
ascertain the nature of my 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 four calender months next and immediately after the date of the said

page_text: Letters Patent, that then the same Letters Patent, and all liberties and
advantages whatsoever thereby granted, should utterly cease, determine, and
become void, as in and and by the said Letters Patent more at large doth
appear.
NOW KNOW YE, that he, the said William Roe, in pursuance and com-
pliance with the said proviso, and the purport and true meaning of the said
Letters Patent, and of His Majesty's said most gracious intentions, do, by this
Instrument in Writing under my hand and seal, duly executed, declare that my
said new process or invention for calcining or burning of poor copper and
lead ores, is performed by the means of kilns or buildings made of stone or
brick, either in a circular, quadrangular, or oblong form, and proportionable
in magnitude to the quantity of ores that are required to be calcined or burnt,
say from five tons to two thousand tons in one kiln. At the sides, ends, or
round the said kilns or buildings, under the ore at convenient distances, are to
be fixed fireplaces, at the roofs of which are placed barrs of iron at such
distances from each other as to admitt a free communication of the flame or
heat to the ore, and at the same time to prevent the ore from falling into the
fireplaces from one side or one end of the kiln to the other, must be left pipes
or draft holes to admit a current of air through sufficient to keep a steady
and regular heat, and to promote the burning of the ore and the evaporation
of the fumes that ascend therefrom. The ore, before put into the kilns or
buildings, is to have all the small seperated from the round, and the round or
large ore put into the kilns or buildings first, which may be calcined or
burnt by itself or covered with the small ore, leaving open at proper places
upon the top or sides of the kiln sufficient spaces to admit the smoak or
sulphur through, and which may either evaporate into the air or be conveyed
into perpendicular or horizontal recipients. The top or surface of the ore
may also be covered with stone, brick, slate, sods of earth or soil, leaving
apertures as before mentioned to admit the smoak through. And as there are
in different parts of the Kingdom of Great Britain called England, and the
Dominion of Wales, particularly upon the Isle of Anglesey, large quantities
of pyrites, marcasites, sulphureous ores, earths and minerals which abound
with silver, copper, and lead, but which, by reason of the earth, sulphur,
stone, and other heterogeneous particles being combined with them, have
never yet been rendered usefull or merchantable, this my new Invention of
calcination will disunite the component particles thereof, and by the method I
make use of for washing or buddling of copper and lead ores, the copper and
lead ores will be seperated from all the dead or useless matter, and make
such pyrites or marcasites merchantable and of great value; and lastly, the

page_text: yrites and marcasites which abound with sulphur, arsenic, copper and lead
res may be rendered usefull and valuable by means of elequation.
In witness whereof, I, the said William Roe, have hereunto set and
put my hand and seal, the Fourteenth day of June, in the nineteenth
year of the reign of our Sovereign Lord King George the Third, and
in the year of our Lord One thousand seven hundred and seventy-
nine.