IMPROVEMENTS IN THE UTILIZATION OF SEWAGE
Year: 1872

page_text: LETTERS PATENT to Francis Gerard Prange, of Liverpool, in the
County of Lancaster, Merchant, and William Whitthread, of the
same Place, Analytical Chemist, for the Invention of "IMPROVEMENTS
IN THE UTILIZATION OF SEWAGE."
Scaled the 14th June 1872, and dated the 6th February 1872.
PROVISIONAL SPECIFICATION left by the said Francis Gerard Prange
and William Whitthread at the Office of the Commissioners of
Patents, with their Petition, on the 6th February 1872.
We, FRANCIS GERARD PRANGE, of Liverpool, in the County of
Lancaster, Merchant, and WIlliam WhitthREAD, of the same Place,
Analytical Chemist, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN THE UTILIZATION OF SEWAGE," to be as follows:-
Our Invention consists,--

page_text: the nitrogenous and manurial matters held in solution and sus-
pension.
Second. In adding with the above-mentioned chemicals, when there is
an excess of free ammonia, magnesium salts.
The said chemical substances may be added to the sewage (A) in
depositing enclosures whilst the sewage is flowing through at a slow
rate, (B) in settling reservoirs, or (C) in the sewer close to the depositing
enclosures or settling reservoirs. The addition is best effected under
head C, because thereby thorough admixture is secured; a mixing
agitator may be used if desired.
The proportion in which the chemical substances are added will vary
with the quantity of nitrogenous and fertilizing matters contained in the
sewage, and also as it may be desired, to render the effluent treated
If the effluent treated
sewage water more or less clear and sweet.
sewage water is to pass into a stream or into the sea a larger quantity
will be added than in cases where the water is to be used for irrigation,
but we would have it understood that the application of the said
chemical substances in any and every proportion is beneficial both in
respect of deodorizing the water and of precipitating and fixing the
fertilizing matters.
When a sufficient quantity of the fertilizing matters have been carried
down in the depositing enclosures or in the settling tanks the water is
run off, and the fertilizing precipitate collected and used, either in the
pasty state or dried, so as to be convenient for transportation.
SPECIFICATION in pursuance of the conditions of the Letters Patent, 25
filed by the said Francis Gerard Prange and William Whitthread in
the Great Seal Patent Office on the 6th August 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, FRANCIS
GERARD PRANGE, of Liverpool, in the County of Lancaster, Merchant,
and WILLIAM WHITTHREAD, of the same Place, Analytical Chemist, 30
*send greeting.
WHEREAS Her most Excellent Majesty 'Queen Victoria, by Her
"Letters Patent, bearing date the Sixth day of February, in the year of our

page_text: Lord One thousand eight hundred and seventy-two, in the thirty-fifth
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto us, the said Francis Gerard Prange and William Whitthread,
Her special licence that we, the said Francis Gerard Prange and William
Whitthread, our executors, administrators, and assigns, or such others
as we, the said Francis Gerard Prange and William Whitthread, our.
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 UTILIZATION OF SEWAGE," upon the condition (amongst others) that we,
the said Francis Gerard Prange and William Whitthread, our executors
or administrators, by an instrument in writing under our, 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 we, the said Francis Gerard Prange and
William Whitthread, do hereby declare the nature of our said Inven-
tion, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement, that is

page_text: settle in tanks or reservoirs, it will be evident that it may be filtered
through any suitable substance.
Having now described the nature of our said Invention, and par-
ticularized the same in such manner that others will be enabled to carry
our improvements into effect, we claim, utilizing sewage, substantially
by the means herein set forth.
In witness whereof, we, the said Francis Gerard Prange & William
Whitthread, have hereunto set our hands and seals, the Thirty-
first day of July, in the year of our Lord One thousand eight
hundred and seventy-two.
In the presence of
J. T. KING,
Patent Agent,
Liverpool.
FRANCIS GERARD PRANGE. (L.S.)
WILLIAM WHITTHREAD.
(L.S.)