THE ART OF MAKING A SALT COMMONLY CALLED BY. CHYMISTS GLAUBER SALTS, OR THE SAL MIRABILE GLAUBERI, FROM MATERIALS CHEAPER OR DIFFERENT AND BY A METHOD HITHERTO UNKNOWN IN HIS MAJESTY'S DOMINIONS
Year: 1779

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALEX-
ANDER FORDYCE, of Harley Street, Cavendish Square, in the County of
Middlesex, Esquire, send greeting.
WHEREAS His most Excellent Majesty King George the Third did, by
His Letters Patent under the Great Seal of Great Britain, bearing date the
Thirtieth day of April, in the nineteenth year of His reign, give and grant
unto me, the said Alexander Fordyce, His especial licence that I, the said
Alexander Fordyce, during the term of years therein expressed, should and
lawfully might use, exercise, and vend, within England, Wales, and the Town
of Berwick-upon-Tweed, and also within all His Majesty's Colonies and Plan-
tations abroad, my Invention of "THE ART OF MAKING A SALT COMMONLY CALLED
BY. CHYMISTS GLAUBER SALTS, OR THE SAL MIRABILE GLAUBERI, FROM MATERIALS
CHEAPER OR DIFFERENT AND BY A METHOD HITHERTO UNKNOWN IN HIS MAJESTY'S
DOMINIONS;" in which said Letters Patent there is contained a provisoe,
obliging me, the said Alexander Fordyce, under my hand and seal, to cause
a particular description of the nature of my said Invention, and how the same
is to be performed, to be inrolled in His Majesty's High Court of Chancery
within four calendar months after the date of the said recited Letters Patent,
as in and by the same (relation being thereunto had) may more fully and at
large appear.
NOW KNOW YE, that in compliance with the said provisoe, I, the said
Alexander Fordyce, do hereby declare that my said Invention of the Art of
Making a Salt commonly called by Chymists. Glauber Salts, or the Sal

page_text: Mirabile Glauberi, from Materials cheaper or different, and by a Method
hitherto unknown in His Majesty's Dominions, is described in the manner
following (that is to say) :-
1
Take in the proportion of seventy-five pounds of green vitriol which has
been calcined, and mixing the same accurately with fifty pounds of decrepitated
salt, put them into a reverberating furnace, already a good deal heated, and
apply a strong fire till it acquires a cherry heat. The contained matter will
soon become liquid. It is then to be a good deal stirred. The heat being
gradually encreased, the contents of the furnace will acquire the consistence of
a soft paste. It is now proper to draw it from the furnace by a rake, or to lift
it out with long iron shovels, and put it into an iron pott or stone vessell, where
it will gradually grow cold. It must be afterwards beat or ground small
that it may dissolve in water with greater facility. Having been well stirred
and dissolved in the water, it must be suffered to settle, and the pure part
is then to be poured off into leaden or flat earthen pans, where it will
chrystallize into Glauber salt. If, after standing a week, there shall be any
of the liquor which has not crystalized, the same must be poured off and
boiled down about a third, and then suffered to cool and crystallize as before.
After this second operation, if any of the salt is found undecomposed, the
solution must be evaporated to dryness, be again putt into the furnace with
about half a pound of calcined vitriol to a pound of the dried solution, and
treated as at first.
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