IMPROVEMENTS IN MAKING SUGAR FROM SUGAR CANE, AND IN REFINING SUGAR
Year: 1838

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
STOLLE, of Arundel Street, Strand, in the County of Middlesex, Esquire, send
greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Twenty-fourth day of February, in the first year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Edward Stolle, Her especial licence, full power, sole privilege and authority,
that I, the said Edward Stolle, my exors, admors, and assigns, or such others
as I, the said Edward Stolle, my exors, admors, or 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 and lawfully might make, use,
exercise, and vend, within England and Wales and the Town of Berwick-
upon-Tweed, and also in all Her said Majesty's Colonies and Plantations
abroad, my Invention of "IMPROVEMENTS IN MAKING SUGAR FROM SUGAR CANE,
AND IN REFINING SUGAR;" in which said Letters Patent is contained a proviso
that I, the said Edward Stolle, shall cause a particular description of the
nature of my said Invention, and in what manner the same is to be performed,
to be inrolled in Her said Majesty's High Court of Chancery within six
calendar months next and immediately after the date of the said in part
recited Letters Patent, as in and by the same, reference being thereunto had,
will more fully and at large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
Edward Stolle, do hereby declare that the nature of my Invention, and
the manner in which the same is to be performed, are fully described and
ascertained in and by the following statement thereof, that is to say:―
The constituent parts of my Invention consist in the application of a new
chemical agent for the discolouring of saccharine matters (sugar), for which
purpose animal charcoal has been generally employed. The discoloring
quality of the sulphurous acid is already sufficiently known, and need not
therefore be further noticed; but another advantage which results from
employing this agent for sugars which have been operated upon by lime
previously, is that the sulphurous acid precipitates this alkali, and prevents
fermentation of the saccharine matters. The manner of employing my im-
provement is as follows:-The juice of the cane is defecated with one or two
thousandth parts of lime, so that for a kettle containing one thousand pounds
of juice about two pounds of lime are employed; when boiling, the scum or
dirt which rises to the top is taken away, and afterwards twelve pounds of
liquid sulphurous acid (marking no more than four degrees by Beaume's
areometer) are slowly poured into the juice with care, after which the juice
is evaporated to the thickness of about twenty or twenty-two degrees, and
passed through a filter of flannel or other suitable substance, and concentrated;
till it arrives at the proper degree for crystallization. For the first crystalli-
zation the juice or syrup must not be too thick, because a second operation or
crystallization may
be obtained, furnishing twenty or thirty per cent. of sugar.
when the first boiling has not been pursued too far.
For refining of sugar of very bad quality the process must be modified
after this manner:-I employ a very strong concentrated alcohol or spirit
charged with about two per cent. of sulphurous acid, and mix it with such a
suitable quantity of sugar, so that a small portion only of the liquid swims
upon the sugar; it is then stirred several times, and after about two hours the
liquid is drawn off, after which the sugar is washed in pure alcohol. By these
means the molasses is dissolved and removed by drawing off, and the crystal-
lized sugar, being insoluble by alcohol, remains in the vessel quite white and
clear. The alcohol which has been used for washing the sugar is distilled
and separated in this manner from the molasses, and can be employed again
for the same purpose.
In witness whereof, I, the said Edward Stolle, have hereunto set my
hand and seal, this Twenty-fourth day of August, One thousand eight
hundred and thirty-eight.
EDWARD (L.S.) STOLLE.

page_text: AND BE IT REMEMBERED, that on the Twenty-fourth day of August,
in the year of our Lord 1838, the aforesaid Edward Stolle 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 Twenty-fourth day of August, in the year of our Lord One
thousand eight hundred and thirty-eight.