A NEW OR IMPROVED METHOD OR NEW OR IMPROVED METHODS OF PRE- PARING GELATINE, WHICH HAS THE PROPERTIES OP OR RESEMBLES GLUE
Year: 1839

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
NELSON, of Milverton, in the County of Warwick, Chemist, send greeting.
WHEREAS Her present most Excellent Majesty hath granted unto me
Her Letters Patent, bearing date at Westminster, the Twenty-third day of
March, in the second year of Her reign, for making, using, exercising, and
vending, within England, Wales, and the Town of Berwick-upon Tweed, and
also in all Her said Majesty's Colonies and Plantations abroad, my Invention
of "A NEW OR IMPROVED METHOD OR NEW OR IMPROVED METHODS OF PRE-
PARING GELATINE, WHICH HAS THE PROPERTIES OP OR RESEMBLES GLUE," subject
to the usual proviso, obliging me to describe and ascertain the nature of the
said Invention, and in what manner the same is to be performed.
NOW KNOW YE, that in compliance with the said proviso, I, the said
George Nelson, do hereby describe and ascertain the nature of my said
Invention, and in what manner the same is to be performed in manner
following, that is to say:-
I make such gelatine as above mentioned of two different qualities, and I
call such gelatine, according to its quality, my gelatine of the first quality.or
my gelatine of the second quality; and I use all such hides and skins and.
cuttings of hides and skins as are usually employed in manufacturing glue
according to the ordinary method, and which are commonly called glue pieces,
but I separate and reject any which have become putrescent as being unfit for.
the application of my Invention. My Invention consists in using or applying

page_text: to the glue pieces which I use a caustic alkaline solution, either with or
without acid, or acid (not being sulphurous acid in a liquid state) without such
solution for preparing gelatine, which has the properties of or resembles glue.
Before I apply my Invention, the glue pieces which I use must be freed from
hair or wool and flesh and fat, and then washed clean in cold water; and
when I make the gelatine which I call my gelatine of the first quality, I
prefer to use the cuttings of the hides of beasts or of the skins of calves.
gene-
I shall first describe the method by which I prepare the gelatine which I
call my gelatine of the first quality, and for the purpose of reference I
designate this method the first operation. I have already stated that when
I make this gelatine, I prefer to use the cuttings of the hides of beasts, or of
the skins of calves. When the cuttings have been freed from hair, flesh, and
fat, and washed clean in cold water, I score the grain side of them to the
depth of about an eighth part of an inch in lines about an inch apart, in order
to facilitate the action of the alkali which I use, and to render such action
more uniform; I then macerate them in a caustic solution of alkali at a
temperature of about sixty degrees of Fahrenheit, using for this purpose brick
vats or vessels lined with cement in the ordinary manner, and these vats
or vessels which I call the macerating vessels must be covered with lids
excluding the general atmosphere; any vessels which are not acted upon by the
alkali may be used. I thus macerate the cuttings until I can pass a fork or
any other similar instrument through them with little resistance, and I
rally find that they are sufficiently macerated in about ten days. The alkali
which I prefer for my solution is soda; and I prepare my solution in the
ordinary method, using three parts of the common soda of commerce with
two parts of fresh burnt lime to sixteen parts water, or any quantity of fresh
burnt lime sufficient to render the solution caustic may be used. When the
process of maceration is sufficiently complete as already pointed out, I remove
the cuttings from the solution and put them into vessels similar to the
macerating vessels, and which must also be covered with lids excluding the
general atmosphere, and I leave them in such vessels thus covered until they
have become sufficiently soft; it will be ascertained whether they have become
sufficiently soft by passing a fork or other similar instrument through them,
and when they have become sufficiently soft the fork or other instrument will
pass easily through them. Whilst the cuttings are thus left to become soft,
they must be kept at a temperature between 60° and 75° of Fahrenheit, and as
they become sufficiently soft as above pointed out, I remove them, and I slice
or split such of the cuttings as are materially thicker than the others, in order
to bring them to the same or nearly the same thickness. I then put the

page_text: cuttings into wooden cylinders placed in water vessels filled with clean cold
water, but care must be taken not to put into any cylinder more than half the
quantity which it is capable of containing. These cylinders which I call
washing cylinders must be constructed in such a manner as to allow water to
pass freely through them, and they may be fitted in the water vessels in any
convenient manner to allow of their revolving within such vessels, I secure the
cuttings within these cylinders, and then I cause the cylinders to revolve
slowly in the water. I have found cylinders of three feet in diameter a con
venient size, and I cause these to revolve at a speed of about one revolution
in a minute. Whilst the washing cylinders are thus revolving, I cause a.
current of water to be kept up through each of the water vessels by means of
an aperture at the bottom of the vessel at one end, and a pipe at the top at
the opposite end, through which pipe clean cold water is continually supplied.
I continue the cylinders revolving in a current of water as I have described
until the alkali is sufficiently washed out of the cuttings, and I generally
find six or seven days sufficient for this wasbing when I use cuttings of
ordinary thickness, but when I use cuttings which are thicker than these,
I continue the washing in proportion to the thickness of such cuttings.
When the cuttings have been thus washed; I remove them from the washing
cylinders, and place them in a wooden closet constructed in the ordinary
method, to prevent the escape of gas, and there expose them to the direct
action of sulphurous acid gas, produced by the combustion of sulphur within
the closet. I continue the cuttings thus exposed to the direct action of this
gas until they have a slight excess of acid, and I ascertain whether they have
an excess of acid by testing them with litmus paper in the ordinary manner.
I then remove them from the closet, and press them by any ordinary means
to.separate as much water as possible, and after they have been thus pressed I
put them into glazed earthenware vessels, or any other vessels which are not
acted upon by acid. I call these vessels steam baths, and I apply steam to them
in the manner usually employed for heating steam baths; but any other con-
venient means of heating them may be used. I thus bring the cuttings to a
temperature of about 150° of Fahrenheit, and I keep them at this temperature,
and by means of a suitable wooden instrument I stir or agitate them until they
are almost entirely dissolved. The liquid thus formed is gelatine; and I separate
it from the residuum which remains undissolved by straining, and put it into
vessels, which I call settling vessels, and which are constructed in the same
manner as the steam baths.. I heat these settling vessels in the manner
which I have already pointed out for heating the steam baths. Whilst this
liquid gelatine is in these settling vessels it should be kept at a temperature

page_text: between 100° and 120° of Fahrenheit, and I allow it to remain undisturbed in
the settling vessels, for the purpose of clearing it, until I consider that the im-
purities which it contains-have sufficiently settled or subsided. I generally find
rine hours sufficient for this purpose, but if the impurities have not sufficiently
settled or subsided in that time, I prefer to clear it by straining it through a
woollen cloth. I remove the liquid gelatine from the settling vessels by means
of a syphon, but any other suitable means may be used for this purpose; and
after it has been sufficiently cleared, I pour it upon slabs, which I call cooling
slabs, to the depth of about half an inch; these slabs may be of stone, or slate,
or marble, but they must have frames of some convenient material, at least
half an inch in depth, fitted to their edges; and care should be taken to place
the slabs in cool situations. I allow this gélatine to remain upon the slabs
until it becomes cold, and sets into a firm substance, and I then cut it into
pieces, and wash these in the washing cylinders and water vessels, which I
have already described, in the same manner as I have already mentioned for
that purpose in respect to the cuttings, as I take them from the macerating
.vessels. This washing must be continued until the excess of acid is entirely
or nearly altogether removed from the gelatine, and I generally find that three
days are sufficient for this purpose, but I ascertain whether the excess of acid
has been removed by testing the gelatine with litmus paper, in the ordinary
manner. After the excess of acid has been thus removed, I take the gelatine
from the cylinders and put it into the steam baths, and then dissolve it by
applying heat to the baths in the manner which I have already pointed
out for that purpose; but it will be desirable to avoid raising the temperature
of the gelatine above 85° of Fahrenheit, When the gelatine has been thus
completely dissolved I pour it again upon the cooling slabs as before, and I
allow it to remain until it again becomes cold and sets into a firm substance ;
I then cut it into pieces of any convenient size, and dry it upon nets by
exposure to a current of cool dry air, and when it has been thus completely
dried it is fit for use. In the operation which I have described I have stated
This undissolved
that a residuum of the cuttings remains undissolved.
residuum may be used in the manner which I have herein-after mentioned for
that purpose.
I call the gelatine which I obtain by the operation already described my
gelatine of the first quality; but equally good gelatine may be obtained from
the cuttings of the bides of beasts and of the skins of calves by the use or
application of alkali without using or applying acid to such cuttings; and I
shall now describe the method which I employ for this purpose; and for the
purpose of reference I designate this method the second operation. I treat

page_text: the cuttings in the manner which I have described in the first operation until
they have been washed and taken from the washing cylinders, and I then
press them by any ordinary means to separate as much water as possible;
and. after they have been thus pressed I put them into the vessels which I
call steam baths, and heat these vessels, by applying steam in the usual way
for that purpose, until the cuttings attain a temperature of 120° of Fahrenheit;
but. any other convenient means of heating these vessels may be used.. I
keep the cuttings at this temperature, and stir or agitate them by any ordinary
means for about four hours. The cuttings will thus be partially dissolved,
but in a smaller proportion than by the first operation.. The liquid thus
formed is gelatine, and I separate it from the residuum which remains
undissolved by straining, and put it into the settling vessels.
I heat these
vessels in the manner which I have already pointed out for that purpose, and
whilst this liquid remains in these vessels it should be kept at a temperature
of 100° Fahrenheit. I allow the gelatine to remain undisturbed in these
vessels until the impurities which it contains have sufficiently settled or
subsided. I generally find six hours sufficient, but it may be allowed to
remain longer if considered desirable. After it has been thus cleared I remove
the liquid gelatine from the settling vessels, in the manner which I have
already described for. that purpose, and pour it upon the cooling slabs to the
depth of about half an inch;. and I allow it to remain upon these slabs until
it becomes cold, and sets into a firm substance. I then cut it into pieces of
a convenient size, and dry it upon nets by exposure to a current of cool dry
air, and when it has been thus completely dried it is fit for use.
I shall now describe the method by which I prepare the gelatine which I
call my gelatine of the second quality, and for the purpose of. reference I
designate this method the third operation. In making this gelatine I use any
such glue pieces as are herein-before mentioned, not being putrescent, and after
they have been freed from hair or wool, flesh and fat, and washed clean in cold
water, I steep or soak them in a weak solution of acid other than sulphurous
acid, and I. prefer to use sulphuric acid, muriatic acid, or acetic acid, but I find
sulphuric acid the most convenient, and I add acid to such solution from time
to time, until the glue pieces have an excess of acid; any vessel may be used
for this purpose which will not be acted upon by acid, or instead of thus
steeping.or soaking the glue pieces, I sometimes place them in a wooden closet
constructed in the ordinary method to prevent the escape of gas, and there
expose them to the direct action of sulphurous acid gas, produced by the
combustion of sulphur within the closet, and continue them thus exposed to the
direct action of such gas until they have an excess of acid. I ascertain

page_text: whether the glue pieces have an excess of acid by testing them with litmus
paper in the ordinary manner. So soon as they have such excess, I remove
them from the solution or from the closet (as the case may be);, and put them
into any convenient wooden vessels, and I keep them in these vessels at a
temperature of about 70° of Fahrenheit about three weeks. I then put them
into the steam baths and apply heat to these baths in any convenient manner,
until the glue pieces attain a temperature of about 180° of Fahrenheit,
and I keep up this temperature until the glue pieces are entirely dissolved.
The liquid.thus formed is gelatine, and I then proceed to treat this gelatine in
the same manner as I have already. mentioned in describing the method
designated the first operation; after I have stated that the glue pieces have been
almost entirely dissolved until this gelatine has been completely dried and is fit
for use, in describing the method which I have designated the second operation,
I have stated that a residuum of the cuttings remains undissolved; I use this
residuum for the purpose of preparing the gelatine which I call my gelatine of
the second quality in the manner herein-after mentioned. After this residuuni
has been separated from liquid gelatine as herein-before mentioned, .I put it
into vessels constructed of wood or other suitable material, and whilst it
remains in a heated state I add to it from time to time diluted acid, not being
sulphurous acid, until such residuum has an excess of acid, and I ascertain
whether it has such excess by testing it with litmus paper in the ordinary
manner. I prefer use sulphuric acid, muriatic acid, or acetic acid, but I
find sulphuric acid the most convenient. This residuum when it has an excess
of acid, and the residuum which I have stated remains undissolved in describing
the method designated the first operation, as this last-mentioned residuum is
separated from liquid gelatine, may be treated either alone or together with
such glue pieces, having an excess of acid, as I employ in preparing my gelatine
of the second quality, in all respects in the same manner as I have already
pointed out or referred to as my mode of treating such glue pieces in describing
the method which I have designated the third operation. If the residuum or
the glue pieces which I use in preparing the gelatine which I call my gelatine
'of the second quality, has been exposed to the action of sulphurous ácid gas,
or of sulphuric acid, I prefer to remove from them any excess of acid by adding
a suitable quantity of lime or carbonate of lime. to the liquid gelatine produced
from them immediately after I remove such gelatine into the. settling vessels,
and in this case I allow such gelatine to remain undisturbed in the settling
vessels at a temperature not less than 100° of Fahrenheit, for a period of about
twelve hours; I then remove this gelatine from the settling vessels in tho
manner which I have already described, and I pour it upon the cooling slabs

page_text: as already pointed out, and allow it remain upon these slabs until it becomes
cold and sets into a firm substance, I then cut it into pieces of a convenient
size, and dry it on nets by exposure to a current of cool dry air, and when it
has been thus completely dried it is fit for use.
The gelatine which I prepare by any of the methods herein-before mentioned
has the properties of or resembles glue, and may be applied to all the purposes
for which gelatine is commonly used under the name of size or glue; but my
gelatine of the first quality may also be applied to culinary purposes.
Now I hereby declare that I do not claim as my Invention the use of any
particular vessels or apparatus, nor the preparation or application of any
particular caustic alkaline solution, nor the use or application of sulphurous
acid in a liquid state, nor the use or application of any acid in particular;
except as herein-after mentioned in respect to the use of sulphurous acid in a
gaseous state; but I claim as my Invention the use or application of a caustio
alkaline solution either with or without acid, and of acid other than sulphurous
acid, without such solution to such glue pieces as are herein-before mentioned,
and as are not putrescent, for preparing gelatine, which has the properties of
or resembles glue; and I also claim as my Invention the use of sulphurous
acid in a gaseous state, for exposing such glue pieces as are herein-before
mentioned and as are not putrescent to the direct action of such acid in a
gascous state, in preparing gelatine, which has the properties of or resembles
glue.
In witness whereof, I, the said George Nelson, have hereunto set my
hand and seal, the Seventeenth day of September, in the year of our
Lord One thousand eight hundred and thirty-nine
GEORGE (L.S.) NELSON.
AND BE IT REMEMBERED, that on the Seventeenth day of September,
in the year of our Lord 1839, the aforesaid George Nelson came before our
said Lady the Queen. in Her Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained and specified, in form
above written. And also the Specification aforesaid was stamped according
to the tenor of the Statute made for that purpose.
Inrolled the Nineteenth day of September, in the year of our Lord One
thousand eight hundred and thirty-nine.

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
NELSON, late of Milverton, in the County of Warwick, Chemist, but now of
the Borough of Warwick, in the said County, Manufacturer of Gelatine, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria by Her Letters
Patent, under the Great Seal of Great Britain, bearing date at Westminster,
the Twenty-third day of March, in the second year of Her reign, did, for
Herself, Her heirs and successors, give and grant unto me, the said George
Nelson, my exors, adiñors, and assigns, Her especial licence, full power, sole
privilege and authority, that I, the said George Nelson, my exors, adiñors; or
assigns, and such others as I, the said George Nelson, my exors, adiñors, or
assigns, should at any time agree with, and no others, from time to time and
at all times thereafter, during the term of years therein expressed, should and
lawfully might make, use, exercise, and vend, within that part of the United
Kingdom of Great Britain and Ireland called England, the Dominion of
Wales, the Town of Berwick-upon-Tweed, and also in all Her said Majesty's
Colonies and Plantations abroad, my Invention of "A NEW OR IMPROVED
METHOD OR NEW OR IMPROVED METHODS OF PREPARING GELATINE, WHICH HAS THE
PROPERTIES OF OR RESEMBLES GLUE;" and whereas, in pursuance of a proviso in
the said recited Letters Patent contained, I, the said George Nelson, did cause
a particular description of my said Invention, and in what manner the same is
to be performed, by an instrument in writing under my hand and seal, to be
inrolled in Her said Majesty's High Court of Chancery, on the Nineteenth day
of September, in the year of our Lord One thousand eight hundred and thirty-
nine; and whereas, I, the said George Nelson, am desirous, for good and
sufficient reasons herein-after mentioned, to enter a Memorandum of Alteration
of that claim contained in my said Specification, which relates to the use. or
application of acid other than sulphurous, acid without a caustic alkaline
solution, in order that the same claim may not apply to or include the use or
application of any acid other than sulphuric acid, muriatic acid, or acetic acid;
and also a Disclaimer of that claim in my said Specification which relates to
the use of sulphurous acid in a gaseous state; and I am also desirous to enter
a Memorandum of such Alterations in my said Specification as may be necessary

page_text: or proper, in order to omit so much of the said Specification as relates to the
use of sulphurous acid in a gaseous state, and in order to remedy the effects
of such alteration and disclaimers, as herein-before mentioned, and to render
the various parts of the said Specification consistent with each other, and with
the context, and I have obtained leave of Her Majesty's Solicitor-General,
certified by his fiat and signature, according to the form of the Statute in such'
case made and provided.
KNOW YE THEREFORE, that I, the said George Nelson, do hereby*
disclaim the following parts of the said Specification, and do alter the said
Specification in manner herein-after mentioned, that is to say, I disclaim the'
words "acid (not being sulphurous acid in a liquid state)," in the twelfth line'
of the first skin of the said Specification, [page 2, line 2], and instead of the
same words, I insert the words following, that is to say, "otherwise one of
the acids herein-after mentioned."
I disclaim the words "six or seven" in the thirty-ninth line of the first skin of
the said Specification, [page 3, line 16], and instead of the same words, I
insert the words following, that is to say, "three or four."
I disclaim the words " place them in a wooden closet constructed in the
"ordinary method, to prevent the escape of gas, and there expose them," in the
first line of the second skin of the said Specification, [page 3, line 20], and
that part of the said Specification which immediately follows the same as far
as the thirtieth line of the said second skin of the said Specification, including
the said last-mentioned line, and also the words, "until they have been
"washed and taken from the washing cylinders, and I then," in the thirty-
first line of the said second skin of the said Specification, [page 5, line 1].
I disclaim the words, "the vessels," in the thirty-second line of the said
second skin of the said Specification, [page 5, line 4], and instead of the same
words, I insert the words following, that is to say, "vessels constructed of
earthenware, slate, iron, or other suitable material," and immediately pre-
ceding the word "heat," in the same line, [page 5, line 5]. I insert the
pronoun " I."
I disclaim the words "but in a smaller proportion than by the firs
"operation," in the thirty-fourth line of the said second skin of the said
Specification, [page 5, line 10].
I disclaim the words "the settling vessels," in the thirty-fifth line of the said
second skin of the said Specification, [page 5, line 12], and instead of the
same words I insert the words following, that is to say, "vessels which I call
settling vessels, and which are constructed of such materials as I have
pointed out for the steam baths, and.".
"
66

page_text: "
I disclaim the words "that purpose and," at the end of the said thirty-fifth
line of the said second skin of the said Specification, [page 5, line 13], and
instead of the same words, I insert the words following, that is to say, "beat.
ing such baths," and I desire that the word "whilst," at the beginning of
the thirty-sixth line of the said second skin of the said Specification [page 5,
line 14], may be read as the beginning of a new sentence.
I disclaim the words "in the manner which I have already described for
that purpose, and pour it upon the cooling slabs to the depth of about half
"an inch, and I allow.it;" in the thirty-eighth and thirty-ninth-lines of the said
second skin of the said Specification, [page 5, line 19,] and instead of the
same words, I insert the words following, that is to say, "by means of a
syphon, but any other suitable means may be used for this purpose, and -I
pour it upon slabs which I call cooling slabs, to the depth of about half an
inch. These slabs may be of stone, or slate, or marble, but they must have
frames of some convenient material, at least half an inch in depth fitted to
"their edges, and care should be taken to place the slabs in cool situations.
"I allow the gelatine."
66
66
I disclaim the word " third," in the second line of the third skin of the
said Specification, [page 5, line 27], and instead thereof I insert the word
"second."
"
I disclaim the words "acid, other than sulphurous acid, and I prefer to use,'
in the third and fourth lines of the said third skin of the said Specification
[page 5, line 30]; and also the words, " or instead of thus steeping or soaking
"the glue pieces, I sometimes place them in a wooden closet constructed
"in the ordinary method to prevent the escape of gas, and there expose
"them to the direct action of sulphurous acid gas, produced by the combustion
"of sulphur within the closet, and continue them thus exposed to the direct
"action of such gas, until they have an excess of acid," in the sixth, seventh,
and eighth lines of the same skin, [page 5, line 34); and also the words "or
"from the closet (as the case may be)," in the tenth line of the same skin,
(page 6, line 3).
66
I disclaim the words "then proceed to treat this gelatine in the same
manner as I have already mentioned in describing the method designated
"the first operation, after I have stated that the glue pieces have been almost
"entirely dissolved until this gelatine has been completely dried and" in the
thirteenth, fourteenth, and fifteenth lines of the said third skin of the said
Specification, [page 6, line 9], and instead of the same words, I insert the
words following (that is to say):-"put this gelatine into such settling vessels
as I have already described, and apply heat to them in the manner herein-

page_text: 46
"
"
"before mentioned for that purpose to keep the gelatine at a temperature
"between one hundred degrees and one hundred and twenty degrees of Fabren-
"heit. I allow this gelatine to remain undisturbed in the settling vessels for the
purpose of clearing it until I consider that the impurities which it contains
"have sufficiently settled or subsided; and I generally find nine hours
"sufficient for this purpose; but if the impurities have not sufficiently settled
"or subsided in that time, I prefer to clear it by straining it through a
"woollen cloth. I remove this gelatine from the settling vessels in the
manner which I have mentioned in describing the first operation; and after
"it has been sufficiently cleared I pour it upon the cooling slabs to the depth
"of about half an inch, and I allow it to remain upon the slabs until it
"becomes cold and sets into a firm substance; I then cut it into pieces and
"wash these in the washing cylinders and water vessels which I have already
"described in the same manner as I have already mentioned for that purpose
in respect to the cuttings as I take them from the macerating vessels in
describing the first operation. This washing must be continued until the excess
"of acid is entirely or nearly altogether removed from the gelatine; and I gene-
rally find that three days are sufficient for this purpose, but I ascertain
"whether the excess of acid has been removed by testing the gelatine with
litmus paper in the ordinary manner. After the excess of acid has been thus
removed, I take the gelatine from the cylinders and put it into the steam
baths, and then dissolve it by applying heat to the baths in the manner
"which I have already pointed out for that purpose, but it will be desirable
"to avoid raising the temperature of the gelatine above eighty-five degrees of
Fahrenheit. When the gelatine has been thus completely dissolved; I. pour
it again upon the cooling slabs, as before, and I allow it to remain until it
again becomes cold and sets into a firm substance; I then cut it into pieces
of any convenient size, and dry it upon nets by exposure to a current of cool
dry air; and when it has been thus completely dried it."
«
"
$6
"
I disclaim the word "second" in the said fifteenth line of the said third skin
of the said Specification, [page 6, line 13,] and I insert the word "first" instead
thereof.
"
I disclaim the words "not being sulphurous acil" in the eighteenth line of
the said third skin of the said Specification, [page 6, line 19,] and also the words
prefer to "in the nineteenth line of the same skin, [page 6, line 22,] and
also the words "and the residuum which I have stated remains undissolved
"in describing the method designated the first operation, as this last mentioned
"residuum is separated from liquid gelatine," in the twentieth and twenty-first
lines of the same skin [page 6, line 24.]

page_text: I disclaim the word "third" in the twenty-third line of the said third skin
of the said Specification, [page 6, line 30], and I insert the word "second"
instead thereof..
I disclaim the words "of sulphurous acid gas, or " in the twenty-fourth
line of the said third skin of the said Specification [page 26, line 32]; and also
the words "nor the use or application of sulphurous acid in a liquid state,
nor the use or application of any acid in particular, except as herein-after
" mentioned in respect to the use of sulphurous acid in a gaseous state," in
the thirty-third and thirty-fourth lines of the same skin [page 7, line 11.]
66
I disclaim the words "acid other than sulphurous acid" in the thirty-fiftli
line of the said third skin of the said Specification, [page 7, line 15], and
instead of the same I insert the words following (that is to say), "sulphuric
66. acid, muriatic acid, and acetic acid."
.
And I also disclaim the words " and I also claim as my Invention the use
"of sulphurous acid in a gaseous state for exposing such glue pieces as are
"berein-before mentioned and as are not putrescent to the direct action of
"such acid in a gaseous state in preparing gelatine, which has the properties
" of or resembles glue," in the thirty-sixth, thirty-seventh, and thirty-eighth
lines of the said third skin of the said Specification [page 7, line 18.]
And I, the said George Nelson, do hereby further declare that my reason
for making and entering the above Disclaimers and Memorandum of Altera-
tions is, that I have discovered that part of the said Invention as described in
the said Specification is not new as to its public use and exercise within that
part of the United Kingdom of Great Britain and Ireland called England, the
Dominion of Wales, the Town of Berwick-upon-Tweed, and Her Majesty's
Colonies and Plantations abroad.
And I, the said George Nelson, do hereby further declare that the above
Disclaimers and Memorandum of Alterations are not, nor are any of them, such
Disclaimers or such Alterations as will extend the exclusive right granted by
the said Letters Patent.
In witness whereof, I have hereunto set my hand, this Twenty-ninth day
of June, in the year of our Lord One thousand eight hundred and
forty-four.

page_text: To the Clerk of the Patents of England.
This is to certify that the above-named George Nelson has applied to me
for leave to enter with you the above-written Disclaimer & Memorandum of
Alteration of part of the Title & Specification of a certain Invention for which
Letters Patent were duly granted to him under the Great Seal of Great
Britain, dated at Westminster, the Twenty-third day of March, in the second
year of Her Majesty's reign, & the Specification of which was enrolled on
Nineteenth day of September, in the year of our Lord One thousand eight
hundred & thirty-nine; and on considering the said application I directed
bim to advertize his said Disclaimer & Alteration in The Times, the Morning
Herald, the Warwick and Warwickshire Advertizer & Leamington Gazette
newspapers, and such advertizements have been duly made, namely, in the
Times of July 11th, 13th, & July 15th, & in the Morning Herald of
July 10th, 11th, & 12th; the Warwickshire Advertizer & Leamington Gazette
July 13th, 20th, 27th; and no objection having been duly made to the said
application, I have accordingly granted leave to the said George Nelson to file
his said Disclaimer & Memorandum of Alteration pursuant to the Statute
passed in the 5th & 6th year of the reign of His late Majesty King William
the Fourth, entitled an Act to amend the Law touching Letters Patent for
Inventions.
AND BE IT REMEMBERED, that on the Fifth day of August, in
the year of our Lord 1844, the aforesaid George Nelson came before our
said Lady the Queen in Her Chancery, and acknowledged the Disclaimer
aforesaid, and all and every thing therein contained and specified, in form
above written. And also the Disclaimer aforesaid was stamped according
to the tenor of the Statute made for that purpose.
Enrolled the Eighth day of August, in the year of our Lord One
thousand eight hundred and forty-four.