A NEW METHOD OF MAKING OR MANU- FATURING A BEAUTIFUL OPAQUE OR TRANSPARENT GARNET OR RED GLASS
Year: 1770

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MATER
OPPENHEIM, of Birmingham, in the County of Warwick, Merchant, send
greeting.
WHEREAS I, the said Mayer Oppenheim, did, by my Petition, humbly
represent to His present most Excellent Majesty King George the Third,
that, after much application and many trials, attended with expence, I had at
last invented and brought to perfection "A NEW METHOD OF MAKING OR MANU-
FATURING A BEAUTIFUL OPAQUE OR TRANSPARENT GARNET OR RED GLASS;"
wherefore and in regard I was the first and true Inventor thereof, and that
the same had never been made by any other person or persons, I therefore
humbly prayed His said Majesty to grant unto me, my executors, adminis-
trators, and assigns, His Royal Letters Patent, for the sole use and benefit of
my said Invention within that part of His said Majesty's Kingdom of Great
Britain called England, His Dominion of Wales, and Town of Berwick-upon-
Tweed, for the term of fourteen years, according to the Statute in that case
made and provided; His said Majesty, being willing to give encouragement to
all arts and inventions which might be for the publick good, was graciously
pleased to condescend to my request; and therefore, by His Royal Letters
Patent, bearing date at Westminster, the Twentieth day of October, in the
tenth year of His reign, of His especial grace, certain knowledge, and meer

page_text: motion, for Himself, His heirs and successors, did give and grant unto me, the
said Mayer Oppenheim, my exccutors, administrators, and assigns, His especial
licence, full power, sole priviledge and authority, that I, the said Mayer
Oppenheim, my executors, administrators, and assigns, and every of them, by
myself and themselves, or by mine or their deputy or deputies, servants or
agents, or such others as I, the said Mayer Oppenheim, my executors,
administrators, 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 my said
Invention, within that part of His said Majesty's Kingdom of Great Britain
called England, His Dominion of Wales, and Town of Berwick-upon-Tweed,
in such manner as to me, the said Mayer Oppenheim, my executors, adminis-
trators, and assigns, or any of us, should in our discretion seem meet, and that
I, the said Mayer Oppenheim, my executors, administrators, and assigns,
should and lawfully might have and enjoy the whole profit, benefit, commodity,
and advantage from time to time coming, growing, accruing, and arising by
reason of the said Invention, for and during the term of years therein men-
tioned, to have, hold, exercise, and enjoy the said licence, powers, priviledges,
and advantages therein-before granted or mentioned to be granted unto me, the
said Mayer Oppenheim, my executors, administrators, and assigns, for and
during and unto the full end and term of fourteen years from the date of the
said Letters Patent next and immediately ensuing, and fully to be compleat
and ended, according to the Statute in such case made and provided; in which
said Letters Patent is contained a proviso, that if I, the said Mayer
Oppenheim, should not particularly describe and ascertain the nature of the
said Invention, and in what manner the same is to be performed, by an instru-
ment in writing under my hand and seal, and cause the same to be inrolled
in His said Majesty's High Court of Chancery within four calendar months
next and immediately after the date of the said Letters Patent, that then the
said Letters Patent, and all liberties and advantages whatsoever thereby
granted, should utterly cease, determine, and become void, anything therein-
before contained to the contrary thereof in anywise notwithstanding, as in and
by the said recited Letters Patent (relation being thereunto had), may more
fully and at large appear.
NOW KNOW YE, that I, the said Mayer Oppenheim, in compliance with
the said proviso, do hereby describe and ascertain the nature of my afore-
said Invention, and declare that the same is to be performed in manner
following (that is to say):-
.
Take two parts of Saxony calcined sand, prepared from the stone called

page_text: quartz, one part of double calcined red lead, mixt with the tenth part thereof of
best calcined magnesse of Piedmont, and with half that quantity of red arsenick,
such as is (prepared) purified from the cobalt in Saxony, and two parts of best
Indian refined saltpetre; mix them all together, and place them in a reverbe-
ratory furnace; give them forty-eight hours calcination; after such calcination,
let the whole be powdered and sifted through a fine sieve, mix as much
refined Indian sal armoniac with the calcined materials as the twentieth part
of the whole quantity. Let this mixture be placed in a glazed pott in your
furnace for twenty-four hours; the said mixture will be melted to a transparent
garnett colour. To have such more opake, add to this second mixture double
the quantity of the above red arsenick as sal armoniac, with double the
quantity of the above magnesse, and proceed as directed. To have such more
transparent red, you need not mix with your second mixture any of the above
arsenick or magnessc, but take what quantity you will of aqua regis, prepared
by Hungarian vitriole and Indian sal armoniac; dissolve in the said aqua
regis a fourth part of the above magnesse as your aqua regis; let it stand
in a sand heat till evaporated. When the whole is evaporated, add to it three
parts of aqua regis, as at first; unto this put twice as much of Dutch gold as
your dissolved magnesse, when done in the like manner of evaporation as the
magnesse. Let this mixture be cool, and mix with every pound of your second
(ingredients or) mixture one pennyweight of this evaporated dissolved matter,
and proceed the same as with all other glass; and if this colour wanted to be
more opake, proceed as above directed.
In witness whereof, I, the said Mayer Oppenheim, have hereunto set
my hand and seal, this Seventeenth day of December, in the eleventh
year of the reign of our said Sovereign Lord George the Third, by the
grace of God of Great Britain, France, and Ireland King, Defender
of the Faith, and in the year One thousand seven hundred and
saventy
MAYER OPPENHEIM. (L. s.)
Sealed and delivered (being first duly
stampt), in the presence of,
RICHARD AMPHLETT,

page_text: AND BE IT REMEMBRED, that the Seventeenth day of December, in
the year above written, the aforesaid Mayer Oppenheim came before the said
Lord the King in His Chancery, and acknowledged the Instrument aforesaid,
and all and every matter and thing therein contained and specified, in form
above written. And also the Instrument aforesaid was stamped according to 5
the tenor of the Statute made in the sixth year of the reign of the late King
and Queen William and Mary of England, and so forth.
Inrolled the Twenty-first day of December, in the year above written.