AN IMPROVED PROCESS PRO- CESS FOR PURIFYING AND PRESERVING WATER
Year: 1865

page_text: LETTERS PATENT to Carl Gustav Lenk, of Dresden, in the Kingdom of
Saxony, now residing at No. 6, Lawrence Lane, Cheapside, in the City
of London, Machinist, for the Invention of "AN IMPROVED PROCESS POR
Sealed the 30th January 1866, and dated the 17th October 1865.
PROVISIONAL SPECIFICATION left by the said Carl Gustav Lenk at
the Office of the Commissioners of Patents, with his Petition, on the
17th October 1865.
I, CARL GUSTAV LENK, of Dresden, in the Kingdom of Saxony, now residing
at No. 6, Lawrence Lane, Cheapside, in the City of London, Machinist,
do hereby declare the nature of the said Invention for "AN IMPROVED PRO-
CESS FOR PURIFYING AND PRESERVING WATER," to be as follows:-
I dissolve about twelve parts of alum, about thirty-two parts of aluminite
(either neutralized or not), about two parts of carbonate of soda, and about
one part of solution of iron or of hypermanganate of potash, in about two

page_text: hundred and forty to three hundred parts of water; and pour the mixture
into the water to be purified and preserved in the proportion of five to ten
drops to the quart of water according to the degree of its impurity; and all
organic and inorganic impurities are thus precipitated. If the water is for im-
mediate use the alum and aluminite only need be employed, but if it is desired
to keep it for any length of time the carbonate of soda with the solution of
iron or hypermanganate of potash should be added either to the mixture, as
above mentioned, or to the water after it is purified. When the water has
been purified it should be drawn off by means of a tube passing into the
centre of the vessel and raised slightly from the bottom, so that no precipitated
impurities can be drawn off with the water.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Carl Gustav Lenk in the Great Seal Patent Office on the
17th April 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CARL
GUSTAV LENK, of Dresden, in the Kingdom of Saxony, now residing at No. 6,
Lawrence Lane, Cheapside, in the City of London, Machinist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventeenth day of October, in the year of our Lord
One thousand eight hundred and sixty-five, in the twenty-eighth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Carl Gustav Lenk, Her special licence that I, the said Carl
Gustav Lenk, my executors, administrators, and assigns, or such others as
I, the said Carl Gustav Lenk, 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 "AN IM-
'PROVED PROCESS FOR PURIFYING AND PRESERVING WATER," upon the condition
(amongst others) that I, the said Carl Gustav Lenk, executors or adminis-
trators, 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.

page_text: NOW KNOW YE, that I, the said Carl Gustav Lenk, do hereby declare
the nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement, that is to say :-
I dissolve about twelve parts of alum, about thirty-two parts of aluminite
(either neutralized or not), about two parts of carbonate of soda, and about
one part of solution of iron or of hypermanganate of potash in about two
hundred and forty to three hundred parts of water, and pour the mixture into
the water to be purified and preserved in the proportion of five to ten drops to
the quart of water according to the degree of its impurity, and all organic and
inorganic impurities are precipitated.. If the water is for immediate use the
alum and aluminite only need be employed, but if it is desired to keep it for any
length of time the carbonate of soda, with the solution of iron or byperman-
ganate of potash, should be added either to the mixture, as above mentioned,
or to the water after it is purified. When the water has been purified it
should be drawn off by means of a tube passing into the centre of the vessel,
and raised slightly from the bottom, so that no precipitated impurities can be
drawn off with the water.
The mode in which I make the mixture is as follows:-I boil the alum
and aluminite (sulphate of alumina) separately in enamelled iron vessels,
each in half of the above quantity of water, until they are thoroughly dissolved,
and then mix them together in an oaken or other wooden vessel, and keep
them stirred until cold, when the mixture is ready for use for purifying pur-
poses; if it is desired to render it preservative also, I then dissolve the other
chemicals in it.
The mixture, if for the purpose of preserving only, is made by dissolving
the carbonate of soda with the solution of iron or the hypermanganate of
potash in water in the proportions above mentioned, and it is ready for imme-
diate use; it should be added to the water to be preserved in the same
proportions as that for purifying also, namely, five to ten drops to the quart of
water.
When the water is to be purified only, or purified and preserved at
the same time, it should be allowed to stand after the mixture has been
added to it until the precipitated matter has settled at the bottom of the
vessel (which will be in about six hours) when the purified water may be
drawn off.
And having now particularly described the nature of my said Invention, and
the manner in which the same is to be performed, I claim as my Invention the

page_text: manufacture of the several mixtures above described, and the use of the same,
either together or separately, for purifying and preserving water of all kinds,
In witness whereof, I, the said Carl Gustav Lenk, have hereunto set my
hand and seal, this Seventeenth day of April, in the year of Our Lord
One thousand eight hundred and sixty-six.
Signed, sealed, and delivered by the said
Carl Gustav Lenk, in the presence of
THOS. HALE,
CARL GUSTAV LENK. (L.S.)
21, Park Road, Barnsbury,
London, N.