A CERTAIN WATERPROOF COMPOUND AND A VEGETABLE LIQUID, WHICH LIQUID IS FOR THE PURPOSE OF BLEACHING, WHITENING, AND CLEANSING WOOLENS, LINENS, COTTONS, AND OTHER ARTICLES IN A SUPERIOR MANNER TO ANY OTHER METHOD OR PREPARATION; AND ALSO FOR PRE- PARING STUFFS OR CLOTHS MADE OF WOOLEN, LINEN, COTTON, OR SILK, IN ORDER BY THE APPLICATION OF THE AFORESAID WATERPROOF COMPOUND TO RENDER THEM IMPENETRABLE TO WET, AND MORE ELASTIC AND DURABLE WHEN MADE INTO GAR- MENTS, &C. FOR WEAR, AND WHICH STUFFS OR CLOTHS I CALL HYDROLAINES
Year: 1797

page_text: JOHNSON, of London, Gentleman, send greeting.
WHEREAS His most Excellent Majesty King George the Third did, by
His Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Twenty-sixth day of July, in the thirty-seventh year of His
reign, give and grant unto me, the said Henry Johnson, His especial licence
that I, the said Henry Johnson, my executors, administrators, and assigns, or
such others as I, the said Henry Johnson, my executors, administrators, and
assigns, should at any time agree with, and no others, from time to time and
at all times during the term of years therein expressed, should and lawfully
might make, use, exercise, and vend, within England, Wales, and the Town
of Berwick-upon-Tweed, my Invention of "A CERTAIN WATERPROOF COMPOUND
AND A VEGETABLE LIQUID, WHICH LIQUID IS FOR THE PURPOSE OF BLEACHING,
WHITENING, AND CLEANSING WOOLENS, LINENS, COTTONS, AND OTHER ARTICLES IN A
SUPERIOR MANNER TO ANY OTHER METHOD OR PREPARATION; AND ALSO FOR PRE-
PARING STUFFS OR CLOTHS MADE OF WOOLEN, LINEN, COTTON, OR SILK, IN ORDER
BY THE APPLICATION OF THE AFORESAID WATERPROOF COMPOUND TO RENDER THEM
IMPENETRABLE TO WET, AND MORE ELASTIC AND DURABLE WHEN MADE INTO GAR-
MENTS, &C. FOR WEAR, AND WHICH STUFFS OR CLOTHS I CALL HYDROLAINES;" in
which said Letters Patent there is contained a proviso, obliging me, the said
Henry Johnson, by an instrument in writing under my hand and seal, par-
ticularly to describe and ascertain the nature of my said Invention, and in

page_text: what manner the same is to be performed, and to cause the same to be
inrolled in His Majesty's High Court of Chancery within one calenda
month next and immediately after the date of the said recited Letters Patent
as in and by the same, reference being thereto had, will more fully and
at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Henry Johnson, do hereby describe and ascertain the nature of my said In
vention, and in what manner the same is to be performed, as follows, that is
to say-
First, to make the said vegetable liquid, I, the said Henry Johnson, either
take horse chesnuts or orange peels and kernels (which are found thrown
away after squeezing), or the offals and galls of fish, or either of them,
(according to the place where they are to be had). I boil for four or five
hours, and then leave them to cool and settle for a few days; or else I add
eight quarts of water to every pound of calcined substance, called British
barilla, which remains for dissolution two or three days. To any or either of
these decoctions, drawn off fine, I add one pound of kelp or wood ashes,
refined and purified (by a method well known), to be equal to pearl ashes, or
else pearl ashes themselves, to every twenty quarts of any of the above liquids,
and after well mixing and remaining for twenty-four hours, I then slack a
superior sort of lime therein, called Ryegate lime, in order to give it the
ehaloric, and precipitate the charcoal of the ashes, and to modify its causticity.
To this prepared liquid (drawn off fine) I add the following preparation,
viz, to every quart of fish, linseed, or any other oil I put forty quarts of
water, and boil it with half an ounce of salt of sorrell, salt of sugar, or rectified
salt of tartar, which incorporates the oil and the water; and this, after settling
for twelve hours, I draw off fine; and to every twelve quarts of the above
prepared liquid I add one quart of this last incorporated oil and water, and
this when settled I call blanching lixivium.
Secondly, as to the waterproof compound, I proceed as follows:-After the
linen, woolen, cotton or silk stuffs, or cloths, hats, or leather are prepared by
the above described blanching lixivium, I stretch them in a frame, and having
dissolved caoutchouc or india-rubber in spirits of turpentine (the smell of
which is taken off by oil of wormwood) and spirits of wine in equal quantities,
the caoutchouc (having become a varnish) I spread with a large piece of the
undissolved caoutchouc (instead of a sponge or brush) upon the wrong side of
the prepared stuff, or cloth, or leather, and then sift over it any colour cloth.
or silk, or worsted, or cony, or other wool, cut fine, in the same manner as

page_text: ock paper is made, and being let to dry for a day or two, this flock by its
dhesion to the caoutchouc is equal to any lining.
In witness whereof, I, the said Henry Johnson, have hereunto set my
hand and seal, the Twenty-seventh day of July, in the thirty-seventh
year of the reign of our Sovereign Lord George the Third, by the
grace of God, of Great Britain, France, and Ireland, King, Defender
of the Faith, and so forth, and in the year of our Lord One thousand
seven hundred and ninety-seven.
Inrolled the same Twenty-seventh day of July, in the year above
written.