AN IMPROVED PRE- PARATION OR COMPOSITION FOR COATING, COVERING, OR COLORING WALLS AND OTHER SURFACES, OR PARTS OF BUILDINGS, AND FOR FORMING MOULDINGS, CORNICES, AND OTHER DECORATIVE PARTS OF HOUSES
Year: 1865

page_text: LETTERS PATENT to William Barwick, of St. Peter's, Thanet, in the
County of Kent, Builder, for the Invention of "AN IMPROVED PRE-
PARATION OR COMPOSITION FOR COATING, COVERING, OR COLORING WALLS AND
OTHER SURFACES, OR PARTS OF BUILDINGS, AND FOR FORMING MOULDINGS,
CORNICES, AND OTHER DECORATIVE PARTS OF HOUSES."
Sealed the 3rd April 1866, and dated the 12th October 1865.
PROVISIONAL SPECIFICATION left by the said William Barwick at the
Office of the Commissioners of Patents, with his Petition, on the 12th
October 1865.
I, WILLIAM BARWICK, of St. Peter's, Thanet, in the County of Kent,
Builder, do hereby declare the nature of the said Invention for "AN
IMPROVED PREPARATION OR COMPOSITION FOR COATING, COVERING, OR COLORING
WALLS AND OTHER SURFACES, OR PARTS OF BUILDINGS, AND FOR FORMING MOULDINGS,
CORNICES, AND OTHER DECORATIVE PARTS OF HOUSES," to be as follows:-
This improved preparation is composed of pulverised carbonate of lime,
sulphur, and fine sawdust of red fir, mixed in various proportions and
treated in different manners according to the purpose for which the pre-
paration is to be employed. If the compound is to be used as a wash for
whiting or coloring walls, ceilings, or other surfaces, I take about one
of pulverized chalk or carbonate of lime, about one pound of pulverized
sulphur, and one gallon of red fir sawdust; I add thereto sufficient water
to make it into a stiff paste and I temper or intimately mix the ingredients

page_text: in a pug mill, after which the compound is formed into cakes or blocks
about two inches thick. These are stacked and dried and then burnt in a
lime kiln. I find it convenient and advisable to burn with these cakes
lumps of chalk or carbonate of lime in its natural state, and when the
ingredients are removed from the kiln they are slaked, ground up, and
sifted to remove the hard and gritty particles. Upon mixing the prepared
substance with a suitable quantity of water it may be used in the same way
as limewash, a suitable quantity of any coloring matter being added if
required. In order to prepare the compound to be used as a plaster or
cement I sometimes dispense with the sawdust, and I carefully sift the
pulverized chalk, so as to remove from it any grit before mixing the
sulphur with it. The compound is made into cakes by the addition of a
little water, and when in a damp state is placed in ovens where it is baked
rather than burned, the steam from the water contained in the compound
appearing to have a beneficial effect on the ingredients. When quite dry
and sufficiently baked the cakes are removed from the oven, ground up to
powder, and sifted, when the fine stuff will be ready for use in the ordinary
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Barwick in the Great Seal Patent Office on
the 11th April 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
BARWICK, of Saint Peter's, Thanet, in the County of Kent, Builder,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twelfth day of October, in the year of our Lord
One thousand eight hundred and sixty-five, in the twenty-ninth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said William Barwick, Her special licence that I, the said William
Barwick, my executors, administrators, and assigns, or such others as I, the
said William Barwick, my executors, administrators, and assigns, should at
any time agree with, and no others, from time to time and at all times there-
after 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
IMPROVED PREPARATION OR COMPOSITION FOR COATING, COVERING, OR COLORING
WALLS AND OTHER SURFACES, OR PARTS OF BUILDINGS, AND FOR FORMING MOULD-
INGS, CORNICES, AND OTHER DECORATIVE PARTS OF HOUSES," upon the condition

page_text: (amongst others) that I, the said William Barwick, 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 William Barwick, 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 improved preparation which forms the subject of the present Inven-
tion is composed of pulverized carbonate of lime, sulphur, and sawdust,
mixed in various proportions and treated in different manners according to
the purpose for which the preparation is to be employed.
If the compound is to be used as a wash for whiting or coloring walls,
ceilings, or other surfaces, I take about one bushel of pulverized chalk or
carbonate of lime, about one pound of pulverized sulphur, and one gallon
of red fir sawdust, and add thereto sufficient water to make it into a stiff
paste. I prefer to use the sawdust from red fir when it can be obtained,
but other sawdust which is rich in resinous matter will answer the pur-
pose. The ingredients are to be well mixed in a pug mill, after which the
compound is to be formed into cakes or blocks about two inches thick.
After these cakes or blocks have been stacked and dried they are to be
burnt or calcined in a lime kiln in order to drive off the carbonic acid from
the lime. I find it convenient and advisable to burn with these cakes
lumps of chalk or carbonate of lime in its natural state, and when the
ingredients are removed from the kiln they are ground up, and if desired
they may be sifted to remove the hard and gritty particles. Upon mixing
the prepared pulverized substance with a suitable quantity of water it may
be used in the same way as limewash, any coloring matter being added if
required. The improved preparation or composition above described will
be found a capital disinfectant, and may therefore be advantageously
employed in any situations where noxious exhalations are likely to arise, or
where for sanitary purposes it is considered desirable to use a limewash.
In order to prepare the compound to be used as a plaster or cement I
carefully sift the pulverized chalk so as to remove from it any grit before
mixing the sulphur with it. The compound is made into cakes by the
addition of a little water, and it is exposed to heat while in a damp state,

page_text: as the steam from the water contained in the compound will have a
beneficial effect on the ingredients. When quite dry the mass is to be
calcined or burnt in a kiln, and it is then to be ground and reduced to
powder, when it will be fit for use.
Having now described my Invention of "An Improved Preparation or
Composition for Coating, Covering, or Coloring Walls and other Surfaces, or
Parts of Buildings, and for Forming Mouldings, Cornices, and other Decora-
tive Parts of Houses," and having explained the manner of carrying the same
into effect, I would observe that although the proportions above given are
the best in my opinion for mixing the several ingredients, I do not wish to
confine myself rigidly to such proportions, but I claim as the Invention
secured to me by Letters Patent as aforesaid, the mode herein set forth of
preparing and combining carbonate of lime with other substances, for the
purposes herein set forth.
In witness whereof, I, the said William Barwick, have hereunto set my
hand and seal, the Ninth day of April, in the year of our Lord One
thousand eight hundred and sixty-six.
Witness,
WILLIAM SAMPSON BARWICK,
House Agent, &c.,
St. Peter's, Thanet.
WILLIAM BARWICK. (L.S.).