A CERTAIN COMPOSITION CALLED BRITISH SMALTS OR POWDER BLUE
Year: 1786

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, THOMAS
SIMPSON, of the Town and County of Newcastle-upon-Tyne, Merchant, sends
greeting.
WHEREAS the King's most Excellent Majesty, by His Letters Patent
under the Great Seal of Great Britain, bearing date the Tenth day of October
instant, gave and granted to the said Thomas Simpson, His exors, adñiors, and
assigns, His Majesty's special licence, full power, sole privilege and authority,
that the said Thomas Simpson, his exors, admors, and assigns, and every of
them, by himself and themselves, or by his or their deputy or deputics, servants
or agents, or such others as he, the said Thomas Simpson, his exors, adñors,
or assigns, should at any time agree with, and no others, to make, use, exercise,
and vend "A CERTAIN COMPOSITION CALLED BRITISH SMALTS OR POWDER BLUE," to
have, hold, exercise, and enjoy the licence, powers, privileges, and advantages
granted or mentioned to be granted unto the said Thomas Simpson, his exors,
admors, and assigns, for and during the term of fourteen years, according to
the Statute in such case made and provided; in which said Letters Patent
is contained a proviso that if the said Thomas Simpson shall not particularly
describe and ascertain the nature of his Invention, and in what manner the
same is to be performed, by an instrument in writing under his hand and

page_text: 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 Letters Patent, that then the said Letters Patent, and all liberties
and advantages thereby granted, shall utterly cease, determine, and become
void, anything therein contained to the contrary notwithstanding, as by the
said Letters Patent may more fully appear.
NOW KNOW YE, that the said Thomas Simpson, in pursuance of the said
proviso in the said Letters Patent contained, doth hereby declare that the
nature of the said Invention, and the manner in which the same is to be
prepared, appears and is described and ascertained in the Schedule hereunto
annexed.
In witness whereof, the said Thomas Simpson hath hereto set his hand
and seal, the Twenty-eighth day of October, in the year of our Lord
One thousand seven hundred and eighty-six.
TO MAKE BRITISH SMALTS OR POWDER BLUE.
Take any given quantity of foreign smalts, to which add the same weight of
Prussian blue in such a state of dryness during the manufacture of it as will
make it unite, and give a coloring to the smalts. Let these two substances
be intimately mixed, after which the compound must be dried, finely grinded,
and dress'd into a powder. This constitutes the fabrick of this blue for
bleaching and washing fine linens. For the purpose of bleaching and washing
coarser linens, take Paris white (which is composed of chalk finely levigated),
with or without a proportion of foreign smalts. Mix the same in different
proportions with Prussian blue, as before described and directed, after which
let the mixture be dry'd, levigated, and dress'd into the finest powder.
Acknowledged and delivered, by the
within-named Thomas Simpson
(being first duly stampt), in the
THOS (L.S.) SIMPSON.

page_text: AND BE IT REMEMBERED, that on the Twenty-eighth day of October,
in the year of our Lord 1786, the aforesaid Thomas Simpson 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 Statutes made for that purpose.
Inrolled the Tenth day of November, in the year of our Lord One
thousand seven hundred and eighty-six.