AN IMPROVED METHOD OF PRODUCING INFLAMMABLE GAS FROM PIT COAL, SUPERIOR IN PURITY TO ANY OTHER INFLAMMABLE GAS PRODUCED FROM THE SAME SAID SUB- STANCE BY THE METHOD OR METHODS HITHERTO IN PRACTICE
Year: 1819

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, URIAH
HADDOCK, of Mile End, in the County of Middlesex, Chemist, send
greeting.
WHEREAS His present Majesty King George the Third, in and by His
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Fourth day of May last, for Himself, His heirs and successors,
did give and grant unto me, the said Uriah Haddock, His special licence, full
power, sole privilege and authority, that I, the said Uriah Haddock, my
executors, administrators, and assigns, and every of them, by myself and
themselves, or by my and their deputy or deputies, servants or agents, or such
others as I, the said Uriah Haddock, my executors, administrators, or assigns,
should at any time agree with, and no others, from time to time and at all
times thereafter during the term of years therein expressed, should and law-
fully might make, use, exercise, and vend, within that part of His said
Majesty's United Kingdom of Great Britain and Ireland called England, His
Dominion of Wales, and Town of Berwick-upon-Tweed, my Invention of
"AN IMPROVED METHOD OF PRODUCING INFLAMMABLE GAS FROM PIT COAL, SUPERIOR
IN PURITY TO ANY OTHER INFLAMMABLE GAS PRODUCED FROM THE SAME SAID SUB-
STANCE BY THE METHOD OR METHODS HITHERTO IN PRACTICE;" in which said Letters
Patent there is contained a proviso obliging me, the said Uriah Haddock,
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

page_text: is to be performed, and to cause the same to be inrolled in His Majesty's
High Court of Chancery within six calendar months next and immediately
after the date of the said recited Letters Patent, as in and by the same,
reference being thereto had, will more fully appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Uriah Haddock, do hereby describe and ascertain the nature of my said
Invention, and in what manner the same is to be performed (that is to
say) :-
In the first place, I charge the retort with a quantity of pit coal propor-
tioned to the size thereof, and then add thereto one eighth part; by weight, of
well burnt fresh lime, baryta, strontia, or any other alkaline earth or substance
having a strong affinity for sulphur, such substance being first perfectly freed
from carbonic acid, but I prefer lime, as being the cheapest and, in my
opinion, best adapted to the purpose. I.next cause the products emitted from
the retort to pass through a red-hot cylinder, or other shaped vessel, filled
with well burnt fresh. lime, free from carbonic acid, or or with any other sub-
stance or substances free from carbonic acid, oxygen, ammonia, or sulphur,
and not possessing the property of giving an injurious quality to carburetted
hydrogen gas. I introduce such lime or other substance or substances. to
check the too rapid progress of the volatile ingredients emited from the
retort, in order that any yet undecomposed petroleum may be converted into
carburetted hydrogen, but for this purpose I prefer lime, or any other alkaline
earth, substance or substances, having a strong affinity for sulphur, such. lime
or other alkaline earth, substance or substances, being free, as before directed,
from carbonic acid, oxygen, ammonia, or sulphur. The red-hot cylinder, or
other spaped vessel, must be immediately connected with the retort, so as to
prevent as much possible the condensation. of any petroleum. I then, cause
the gas to be passed through a washer of water, acidulated with sulphuric
acid, or any acidulated water. capable of fixing ammonia, and .I afterwards
continue the process in the manner hitherto in practice..
1.:
In witness. whereof; I have hereto set my hand and seal, the Eighteenth
day of June, in the year of our Lord One thousand eight hundred
and nineteen...
Signed, sealed, and delivered, by the
said Uriah Haddock, in. the presence.
of.!
URIAH HADDOCK. (L.S.)

page_text: AND BE IT REMEMBERED, that on the same Eighteenth day of
June, in the year above mentioned, the aforesaid Uriah Haddock 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.