A COMPOSITION TO PREVENT: TO A VERY EXTENSIVE DEGREE THE EFFECTS, OF FRICTION
Year: 1812

page_text: HARDACRE'S SPECIFICATION.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
THOMAS HARDACRE, of Gloucester Place; New Road, in the Parish of
Saint Mary-le-bone, in the County of Middlesex, Esquire, 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 Sixth day of June last, for Himself, His heirs, and successors, did
give and grant unto me, the said Henry Thomas Hardacre, my executors,
administrators, and assigns, His especial licence, full power, sole privilege, and
authority, that I, 'the said. Henry Thomas Hardacre, my executors, adminis-
trators, 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
Henry Thomas Hardacre, my executors, administrators, or assigns, should at
any time agree with, and no others, 'from time to time and at all times there-
after. during the term of years therein expressed, should and lawfully might
make, use, exercise, and vend my Invention of "A COMPOSITION TO PREVENT: TO
A VERY EXTENSIVE DEGREE THE EFFECTS, OF FRICTION," within England, Wales,
and the Town of Berwick-upon-Tweed; in which said Letters Patent there is
contained a proviso obliging me, the said Henry Thomas Hardacre, 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 enrolled 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 thereto
had, will more fully appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
Henry Thomas Hardacre, do hereby describe and ascertain the nature of my
Invention of the said composition, and how and in what manner the same is
to be compounded and made up, and applied for use, by the Specification
following, that is to say :-
"One hundredweight of plumbago to four hundredweight of pork lard or
beef suet, mutton suet, tallow, oil, goose grease, or any other kind of grease or
greasy substance, but pork lard is the best, which must be well mixed together,
so as to appear to the sight to be only one substance." The same proportions
will answer for any other quantity, that is, "four parts of pork lard or beef suet,
mutton suet, tallow, oil, goose grease, or any other kind of grease or greasy
substance, to one part of plumbago;" and which composition is to be applied
according to the following directions, that is to say:-A sufficient quantity of
the composition to cover the surface slightly over where the bearing acts will
in most cases be enough to prime with, but where the bearing is heavy, or the
friction is great, it must not be sparingly used, particularly on steam and other
engines, and the quantity to be applied to a piston rod must be as much as will
saturate whatever it is packed up with, and in mills the stone spindles must be
boxed up with the composition in the same way; the priming to be repeated
as occasion may require."
In witness whereof, I have hereunto set my hand and seal, the Sixth day
of August, in the year of our Lord One thousand eight hundred and
HENY T. HARDACRE. (L.S.)