AN EMPYREAL AIR STOVE, FOR THE PURPOSE OF PURIFYING THE AIR OF CHURCHES, THEATERS, JAILS, SICK AND ALL OTHER ROOMS, AND INCLOSED BUILDINGS
Year: 1786

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ADAM
WALKER, of the Parish of Saint George, Hanover Square, in the County of
Middlesex, Gentleman, send greeting.
WHEREAS the King's most Excellent Majesty, by Letters Patent under the
Great Seal of Great Britain, bearing date the Twenty-first day of February last,
gave and granted unto me, the said Adam Walker, my exors, adñiors, and
assigns, His Majestie's special license, full power, sole privilege, and authority,
for me, the said Adam Walker, my exors, adñiors, and assigns, and every of them,
by myself and themselves, or by my and their deputy and deputies, servants or
agents, or such others as I, the said Adam Walker, my exors, adiñiors, or assigns,
should at any time agree with, not exceeding the number of five, and no others,
from time to time and at all times thereafter during the term of years therein
expressed, to make, use, exercise, and vend my Invention of "AN EMPYREAL
AIR STOVE, FOR THE PURPOSE OF PURIFYING THE AIR OF CHURCHES, THEATERS, JAILS,
SICK AND ALL OTHER ROOMS, AND INCLOSED BUILDINGS," within that part of His
Kingdom of Great Britain called England, Dominion of Wales, and Town of
Berwick-upon-Tweed, in such manner as to me, the said Adam Walker, my
exors, admors, and assigns, or any of them, should in my or their discretions
seem meet; to have, hold, and enjoy the said license, power, privilege, and
advantage, to me, the said Adam Walker, my exors, adiňors, and assigns, for
the 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

page_text: Statute in that case made and provided; in which said Letters Patent is con-
tained a proviso that if I, the said Adam Walker, should not particularly
describe and ascertain the nature of my said Invention, and in what manner
the same is to be performed, by an instrument in writing under my hand and
seal, and cause the same to be inrolled in His Majestie'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 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 Letters Patent, relation
being thereunto had, will more fully and at large appear.
NOW KNOW YE, that I, the said Adam Walker, in pursuance of the said
proviso in the said Letters Patent contained, do hereby describe and ascertain
the nature of my said Invention, and the manner in which the same is to be
performed, as follows, that is to say:
It is an established truth in natural philosophy that human or animal
breathing, perspiration, the burning of coals and candles, the steam of warm
meat, putrifaction, and particularly heated metals, do all phlogisticate and
render noxious and unwholsome the air of all rooms where any such processes
are going on. The truth is equally well established that one of the grand
intentions of nature, in bringing air into near contact with the blood in the
lungs, is for the wise purpose of that air dissolving and carrying off the super-
abundant phlogiston or inflamable principle of the blood, and thereby to
render it thin, fit for circulation, and nutritive to the body.
The intention and use of this stove, with its internal parts and contents, is
to purify or renovate the air, as above or in any otherwise injured, and to
restore in degree its vivifying spirit, or bring it back to its original purity.
The external part of the stove may be made of any size, or in any form, as
may best suit the place for which it is adapted, and may be composed of cast
iron, wrought iron, plate iron, steel, or any other metal, or of stone, brick, clay,
pottery, or any kind of composition or materials capable of containing fire
or heat.
The internal part of the stove is composed,―
First, of a fireplace or repository for the heat, the size and form whereof
must be governed by the external part of the stove, and may be made of the
same materials as the external part, or may be made of metal, and lined with
clay, pottery, or any kind of composition or materials capable of containing
fire or heat, and from whence, where necessary, an iron flue may be fixed to
convey the smoke to the chimney.

page_text: Second, of a retort, vessell, or bellied pipe, made of pipe or other clay.
pottery, glass, or any kind of earthy composition or materials capable of stand-
ing fire or heat, which must be open at both ends, and capable of containing
the purifying ingredients. The size of it must depend on the dimensions of
the stove and the quantity of dephlogisticated air required; and even two,
three, four, or more retorts may be occasionally employed together in the same
stove at pleasure. This retort, vessell, or bellied pipe must be placed in, over,
under, or besides the fire or heat.
Third, pipes of conduct, made of clay, pottery, glass, metal, wood, or any
other materials, are affixed to the upper end of the retort, vessell, or bellied
pipe, to convey the purified air to the top of the room where the stove stands,
or diffuse it through the room, or into any contiguous room, in direction
or at any distance required.
any
Fourth, in these pipes a belly or cavity is formed, to cotain herbs, essences,
vinegar, &c., to be used as may be required.
Fifth, in order to increase the draught of air over the purifying ingredients,
or to extract bad air from the holds of ships, &c., conduct pipes may be affixed
to the lower end of the retort, and extend through the floors, decks, &c., as
convenience may require.
Sixth, into the retort, vessell, or bellied pipe may be put nitre, minium, clay,
potsherds, or any other ingredients that produce dephlogisticated air.
The fire is by this means prevented from having any other effect on the
purifying ingredients in the retort than heating them. Thus, the air of rooms,
passing through the retort and over the purifying ingredients, receives per-
petual renovation in its passage, agreeable to the obvious and established
doctrines of pneumatics. So much of the internal parts of the stove as contains
the purifying apparatus may be applied or fixed to any stove, grate, fire place,
lamp, or other place where there is either natural or artificial heat.
In witness whereof, I, the said Adam Walker, have hereunto set my
hand and seal, the Seventeenth day of March, in the year of our
Lord One thousand seven hundred and eighty-six.

page_text: AND BE IT REMEMBERED, that on the Seventeenth day of March, in
the year of our Lord 1786, the aforesaid Adam Walker 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 Seventeenth day of March, in the year of our Lord One
thousand seven hundred and eighty-six.