THE COMBINATION OF A NEUTRAL SALT OR POWDER WHICH POSSESSES ALL THE PROPERTIES OF THE MEDICINAL SPRING OF SEIDLITZ, IN GERMANY, UNDER THE NAME OF THE SEIDLITZ POWDERS
Year: 1815

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
FIELD SAVORY, of New Bond Street, in the County of Middlesex, Chemist, send
greeting.
WHEREAS His most Excellent Majesty King George the Third, by His
Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Twenty-third day of August, in the fifty-fifth year of His
reign, did, for Himself, His heirs and successors, give and grant unto me,
the said Thomas Field Savory, His special licence that I, the said Thomas
Field Savory, my executors, administrators, and assigns, or such others as I,
the said Thomas Field Savory, my executors, administrators, or assigns, should
at any time agree with, and no others, from time to time and at all times
during the term of years therein expressed, should and lawfully might make,
use, exercise, and vend, within England, Wales, and the Town of Berwick-
upon-Tweed, my Invention of "THE COMBINATION OF A NEUTRAL SALT OR POWDER
WHICH POSSESSES ALL THE PROPERTIES OF THE MEDICINAL SPRING OF SEIDLITZ, IN
GERMANY, UNDER THE NAME OF THE SEIDLITZ POWDERS;" in which said Letters
Patent there is contained a proviso, obliging me, the said Thomas Field Savory,
by an instrument in writing under my hand and seal, particularly to describe
and ascertain the nature of my said Invention, and in what manner the same
is to be performed, and to cause the same to be inrolled in His Majesty's
High Court of Chancery within two 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 in compliance with the said proviso, I, the said
Thomas Field Savory, do hereby declare that the nature of my said Inven-
tion, and the manner in which the same is to be performed, is described and
ascertained in the following explanation thereof:-
The Process for making the. Seidlitz. Powders as invented and sold by me, the
said Thomas Field Savory, at No. 136, New Bond Street.
Recipe No. 1. Take of subcarbonate of soda, twenty pounds; supertartrate
of potash, twenty-four pounds, (avoirdupoise weight.) Dissolve the subcar-
bonate of soda in twenty-five gallons of boiling water, and add the supertartrate
of potash; filter the solution through paper, and evaporate it in a gentle heat
untill a pellicle appears on the surface, then set it by to crystallize. Re-dissolve
the crystalls thus formed in six times their weight of boiling water. The
solution must again be filtered, evaporated, and crystallized, and afterwards
reduced to a fine powder.
Recipe No.. 2.-Take of. subcarbonate of soda-one hundred- pounds, carbo-
nate of ammonia, twenty-five pounds. Expose the carbonate of soda to a heat
sufficiently strong to liquify it, then add the carbonate of ammonia in powder,
and with.a. heat of 212° dry the-salt, and pass it through a fine sieve.
Recipe No. 3. Take of supertartrate of potash one hundred pounds; mix
it with thirty pounds of finely powdered chalk, .and add it by degrees to one
hundred and sixty gallons of boiling water; stir it for some time, and when the
tartrate of lime has subsided pour off the supernatent liquor, and wash the
residuum repeatedly with cold water. To the tartrate of lime thus formed add
thirty pounds of sulphuric acid, previously diluted with eight times its weight
of water, stir the mixture frequently during twenty-four hours, and after having
seperated the acid from the sulphate of lime by means of strong pressure,
evaporate.it in Wedgewood's dishes over a sand heat till a pellicle appears on
the surface, then set it by to crystallize. These crystalls are to be dissolved in
boiling water, filtered through white filtering paper, and again crystallized.
Each dose of the seidlitz powders consists of two scruples of recipe No. 3,
finely powdered and dissolved in half a pint of spring water, to which are added
two drachms of recipe No. 1, and two scruples of recipe No. 2, (previously
mixed.) They must be stirred together, and taken during the state of effer-
vescence.
In witness whereof, I, the said Thomas Field Savory, have hereunto
set my hand and seal, the Twenty-third day of October, in the year
of our Lord One thousand eight hundred; and fifteen.
THOMAS FIELD SAVORY. (L.S.)

page_text: AND BE IT REMEMBERED, that on the same Twenty-third day of
October, in the year above mentioned, the aforesaid Thomas Field Savory
came before our Lord the King in His Chancery, and acknowledged the
Specification aforesaid, and all and every thing therein contained, in form.
above written. And also the Specification aforesaid was stamped according
to the tenor of the Statute in that case made and provided.
Inrolled the same Twenty-third day of October, in the year above written.