MAKING OF SALT FROM SEA WATER OR BRINE BY STEAM
Year: 1772

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
MACKAY, of Ravenhead, in the County of Lancaster, Esquire, send greeting.
WHEREAS His most Excellent Majesty King George the Third, by His
Letters Patent under the Great Seal of Great Britain, bearing date the
Fourth day of March, in the twelfth year of His reign, did give and grant
unto Daniel Scott, of Westminster, in the County of Middlesex, Gentleman,
and me, the said John Mackay, His especial licence, full power, sole privi-
lege and authority, that we, the said Daniel Scott and John Mackay, 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, and within all His Majesty's Colonies and Plantations abroad, our
Invention of "MAKING OF SALT FROM SEA WATER OR BRINE BY STEAM," and
for the sole vending of such salt after it should be made; in which said
Letters Patent there is contained a proviso obliging the said Daniel Scott and
me, the said John Mackay, under our hands and seals, to cause a particular
description of the nature of our said Invention, and how the same is to be
performed, to be inrolled in His Majesty's High Court of Chancery within
four kalendar 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: And whereas the said Daniel Scott has been and is at present in
parts beyond the seas, and it is uncertain when the said Daniel Scott will
return:

page_text: NOW KNOW YE, that in compliance with the said provisoe, I, the said
John Mackay, for and on the behalf of the said. Daniel Scott and of myself, do
hereby declare that our said Invention of Making Salt from Sea Water or
Brine by Steam, is as follows (that is to
o say) :-
That one salt pan or other vessel is to be fixed over another salt pan,
boiler, or other vessel, into which sea water or brine is to be put; and such
pans, boilers, or other vessels are to be closely joined and cemented together.
That an additional pan or other vessel, made of lead or any other metal or
material, at least four times as big as the other pans or vessels, if not bigger,
with a double bottom, is to be placed as near as can be to the other pans or
vessels. A communication is to be made by meansof a pipe, tube, or other fit
conveyance for the steam from the under pan, boiler, or other vessel, through the
upper pan or other vessel, to the large pan or other vessel, made of lead or any
other metal or material, to convey the steam, by which means the upper pan or
other vessel, and the large pan or other vessel, made of lead or any other metal
or material, is to be kept always hot; and an opening must be made at the further
end of the large pan or other vessel, made of lead or any other metal or ma-
terial, for the fresh water which is made by the steam condensing as it passes
through the double bottom of the large pan or other vessel, made of lead or any
other metal or material, to run away. The under pan, vessel, or boiler is
always to be kept boiling, and emptied by means of a cock, as the brine grows
strong, into the large pan or other vessel, made of lead or any other metal and
material. This process of making salt is to be performed either over a common
furnace fire, in which case the fireplace is to be made upon an arch, which
arch may be filled with liquor underneath, which will receive a considerable
heat from the fire above, or it is to be performed over an oven constructed
for making cynders, in which latter case the oven is to be covered at the
top with the salt pan, boiler, or other vessel, instead of brickwork, and also
built upon an arch for the same purpose as the furnace.
That pans or
other vessels may also be fixed with flews running through them from the
chimney, and shallow pans or other vessels may be made to swim in the hot
liquor contained in the other pans or vessels herein-before described, by
which a considerable evaporation will be obtained, and that the process in
either way above mentioned is chiefly performed by steam.
In witness whereof, I, the said John Mackay, have hereunto set my
hand and seal, this Eleventh day of June, One thousand seven hundred
and seventy-two
JOHN MACKAY.. (L.S.)

page_text: AND BE IT REMEMBRED, that on the same Eleventh day of June,
in the year above mentioned, the aforesaid John Mackay came before our said
Lord the King in His Chancery, and acknowledged the Specification afore-
said, 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 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 Sixteenth day of June, in the year above said.