IMPROVEMENTS IN THE PRODUCTION OF COMPOUNDS CAPABLE OF BEING EMPLOYED AS MANURES
Year: 1870

page_text: LETTERS PATENT to David Forbes, Consulting Engineer, of York
Place, Portman Square, and Astley Paston Price, Consulting
Chemist, of 47, Lincoln's Inn Fields, both in the County of
Middlesex, for the Invention of "IMPROVEMENTS IN THE PRODUCTION-
PROVISIONAL SPECIFICATION left by the said David Forbes and
Astley Paston Price at the Office of the Commissioners of Patcuts,
with their Petition, on the 23rd June 1870.
We, DAVID FORBES, Consulting Engineer, of York Place, Portman
Square, and ASTLEY PASTON PRICE, Consulting Chemist, of 47, Lincoln's
Inn Fields, both in the County of Middlesex, do hereby declare the
nature of our said Invention for "IMPROVEMENTS IN THE PRODUCTION OF
COMPOUNDS CAPABLE OF BEING EMPLOYED AS MANURES," to be as follows:-
This Invention relates to the production of compounds capable of
being employed as manures, and consists in the treatment and utilization
of natural products, principally consisting of phosphates of alumina, such

page_text: for example as those which occur in the West India Islands or elsewhere,
so as to render them more suitable for agricultural purposes.
According to our Invention we submit the before-mentioned natural
products to the action of sulphuric or hydrochloric acid, or of mixtures
of the same, so as to effect the solution of the phosphates of alumina
therein contained, and then precipitating the phosphates by means of
a base; such for example as lime or magnesia, or by means of carbonate
of lime or carbonate of magnesia, or mixtures of the same.
The pre-
cipitated phosphates thus obtained may be employed as manures for
agricultural purposes in the same manner and for the same purposes
for which phosphates of lime are now used in agriculture or otherwise.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said David Forbes and Astley Paston Price in the
Great Seal Patent Office on the 23rd December 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, wc, DAVID
FORBES, Consulting Engineer, of York Place, Portman Square, and
ASTLEY PASTON PRICE, Consulting Chemist, of 47, Lincoln's Inn Fields,
both in the County of Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-third day of June, in the year
of our Lord One thousand eight hundred and seventy, in the thirty-
fourth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said David Forbes and Astley Paston Price,
Her special license that we, the said David Forbes and Astley Paston
Price, our executors, administrators, and assigns, or such others as wc,
the said David Forbes and Astley Paston Price, our executors, adminis-
trators, or 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, usc, 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
PRODUCTION OF COMPOUNDS CAPABLE OF BEING EMPLOYED AS MANURES," upon the
condition (amongst others) that we, the said David Forbes and Astley
Paston Price, our executors or administrators, by an instrument in

page_text: writing under our hands and seals, should particularly describe and
ascertain the nature of the said Invention, and in what manner the
same was to be perforined, 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 we, the said David Forbes and Astley Paston
Price, do hereby declare the nature of our said Invention and in
what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
This Invention relates to the production of compounds capable of
being employed as manures, and consists in the treatment and utilization
of natural products, principally consisting of phosphates of alumina,
such for example as those which occur in the West India Islands or
elsewhere, and known as Redonda Guano or otherwise, so as to render
them more suitable for agricultural purposes.
In carrying out our Invention we submit such before-mentioned
natural products to the action of sulphuric, or of hydrochloric acid or
of mixtures of the same, so as to effect the solution of the soluble
phosphates of alumina therein contained, and after separating, if necessary,
the insoluble portions from the solution, we then effect the precipitation
of the phosphates held in solution or which have been rendered soluble
by means of a basc, such for example as lime or magnesia, or by means
of carbonate of lime or carbonate of magnesia, or mixtures of the same.
The precipitated phosphates thus obtained may be employed as manures
for agricultural purposes, in the same manner and for the same purposes
for which phosphates of lime are now used in agriculture or otherwise.
We would state we wish it to be understood that we do not claim
the treatment of phosphates of alumina generally, but confine ourselves
to the treatment of phosphates of alumina such as or similar to those
which are obtained from the sources mentioned.
Having now described and particularly ascertained the nature of our
said Invention, and the manner in which the same is or may be used
or carried into effect, we would observe in conclusion that what we
consider to be novel and original, and therefore claim as the Invention
secured to us by the herein-before in part recited Letters Patent is, the

page_text: treatment of those natural phosphates of alumina such as are herein
referred to for the production of compounds capable of being employed
as fertilizing agents in the manner herein-before described.
In witness whereof, we, the said David Forbes and Astley Paston
Price, have to this our Specification set our hands and seals,
the Twenty-third day of December One thousand eight hundred
and seventy.
DAVID FORBES.
(L.S.)
ASTLEY PASTON PRICE. (L.S.)