IMPROVEMENTS IN THE MANUFACTURE OF CERTAIN BITUMINOUS MATERIALS.
Year: 1873

page_text: LETTERS PATENT to Pierre Vigouroux, of No. 10, Ruc de la Fidélité,
Paris, in the Republic of France, Civil Engineer, for the Invention
of " IMPROVEMENTS
IN
THE MANUFACTURE OF CERTAIN BITUMINOUS
MATERIALS.
"
Sealed the 29th May 1874, and dated the 4th December 1873.
PROVISIONAL SPECIFICATION left by the said Pierro Vigouroux at the
Office of the Commissioners of Patents, with his Petition, on the
4th December 1873.
I, PIERRE VIGOUROUX, of No. 10, Rue de la Fidélité, Paris, in the
Republic of France, Civil Engineer, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN THE MANUFACTURE OF CERTAIN
BITUMINOUS MATERIALS," to be as follows, that is to say :-
The Invention consists in an improved mixture or composition for
use in the place of asphalt. I prepare this mixture or composition with
the herein-after named substances, in about the following proportions,
videlicet Coal tar, forty-five parts; Nile alluvium, or any analogous
;-

page_text: matter, fifty parts; hydrochloric acid, five parts. The whole is mixed
and heated in a boiler until ebullition has ceased. It is then ready for
use and may be applied for the same purposes as asphalte.
SPECIFICATION filed in pursuance of the conditions of the Letters
Patent, and of an Order of the Lord Chancellor, by the said Pierre
Vigouroux in the Great Seal Patent Office on the 13th June 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PIERRE
VIGOUROUX, of No. 10, Rue de la Fidélité, Paris, in the Republic of
France, Civil Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of December, in the
year of our Lord One thousand eight hundred and seventy-three, in
the thirty-seventh year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Pierre Vigouroux, Her special
licence that I, the said Pierre Vigouroux, my executors, administrators,
and assigns, or such others as I, the said Pierre Vigouroux, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for " IMPROVEMENTS IN THE
MANUFACTURE OF CERTAIN BITUMINOUS MATERIALS," upon the condition
(amongst others) that I, the said Pierre Vigouroux, my executors or
administrators, by an instrument in writing under my, or their, or one
of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same
was to be performed, and cause the same to be filed in the Great Seal
Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that I, the said Pierre Vigouroux, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement, that is to say:-
The Invention consists in manufacturing an improved composition for

page_text: use in place of asphalte (which I call Vigouroux's artificial lava) by the
employment of the substances or materials in the proportions and sub-
stantially in the manner herein-after described, videlicet:-Dry coal tar,
about forty-five parts per one hundred; Nile alluvium deposit, about
fifty parts per one hundred; hydrochloric acid, about five parts per
one hundred. Instead of Nile alluvium I can employ any analogous
deposit. I well mix the whole together and then place it in a boiler and
heat it until all ebullition has ceased. This new product is then ready
and may be employed in a similar manner to asphalte. This artificial
lava will resist the heat of hot climates, videlicet, a temperature of about
sixty degrees Reaumur, as well as great cold.
In witness whereof, I, the said Pierre Vigouroux, have hereto set
my hand and seal, this Second day of June, in the year of our
Lord One thousand eight hundred and seventy-four.
D