NEW AND PECULIAR METHOD OF PREPARING AND MAKING OF OPTICK GLASSES, WHICH I CALL'D BY THE NAME SYLLEPSIS GLASSES, AND ALSO THE APPLI- CATION THEREOF TO OPTICK INSTRUMENTS IN GENERAL, PARTICULARLY TELLESCOPES, MICROSCOPES, READING GLASSES, OPERA GLASSES, AND SPECTACLES, WHEREBY DIS- TINCT VISION IS MORE READILY PROCURED AND THE SIGHT GREATLY RELIEVED, AND BY WHICH SAID PREPARATION OPTICK GLASSES ARE RENDERED MORE PERFECT, AND MAY BE APPLIED WITH GREATER CERTAINTY
Year: 1783

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, greeting.
WHEREAS His present most Excellent Majesty King George the Third,
by His Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Twelfth day of December, in the twenty-fourth year of His
reign, did give and grant unto me, WILLIAM STORER, late of Lisle Street, but
now of Great Marlborough Street, in the County of Middlesex, Gentleman,
His especial licence, full power, sole privilege and authority, that I, the said
William Storer, my exors, adñors, and assigns, and every of us, during the
term of years therein expressed, should and lawfully might use, exercise, and
vend my
"NEW AND PECULIAR METHOD OF PREPARING AND MAKING OF OPTICK
GLASSES, WHICH I CALL'D BY THE NAME SYLLEPSIS GLASSES, AND ALSO THE APPLI-
CATION THEREOF TO OPTICK INSTRUMENTS IN GENERAL, PARTICULARLY TELLESCOPES,
MICROSCOPES, READING GLASSES, OPERA GLASSES, AND SPECTACLES, WHEREBY DIS-
TINCT VISION IS MORE READILY PROCURED AND THE SIGHT GREATLY RELIEVED, AND
BY WHICH SAID PREPARATION OPTICK GLASSES ARE RENDERED MORE PERFECT, AND
MAY BE APPLIED WITH GREATER CERTAINTY," within that part of Great Britain
called England, the Dominion of Wales, and Town of Berwick-upon-Tweed,
in such manner as to me, my exors, administrators, and assigns, or any of
us, should in our discretion seem meet; in which said Letters Patent is
contained a proviso that if I, the said William Storer, should not particularly
describe and ascertain the nature of my said Invention, and in what manner

page_text: the same is to be performed, by an instrument in writing under my hand
and seal, and cause the same to be inrolled in His Majesty's High Court of
Chancery within four calendar months next and immediately after the date
of the said Letters Patent, that then the said Letters Patent, and all liberties
and advantages whatsoever thereby granted, should utterly cease, determine,
and become void, as in and by the said Letters Patent, referrence being there-
unto had, will more fully and at large appear.
NOW KNOW YE, that I, the said William Storer, in pursuance of and
in compliance with the said proviso, and the purport and truc intent and
meaning of the said Letters Patent, and of His Majesty's said most gracious
intentions, do, by this Instrument under my hand and seal duly executed,
declare that my said Method of Preparing Sylepsis Glasses, and the Manner
of Applying them to Optical Instruments in general, particularly to Tellescopes,
Microscopes, Reading Glasses, Opera Glasses, and Spectacles, whereby Distinct
Vision is more readily procured and the Sight greatly relieved, and by which
said Preparation Optick Glasses are rendered more Perfect, and be applied
with greater certainty, is performed in manner following, that is to say :-
The refrangibillty of rays of light is their disposition to be refracted from
the incident rays on their emmerging from any surface of any pelucid medium
which they shall have met in oblique directions. Besides. these oblique rays
there are also rays of light propogated in direct lines from any object to any
optick glass, which is or ought to be so placed so as all rays for distinct vision
may be transmitted through such optick glasses in a direct line with the
incident ray, for all vision-making rays are transmitted through a syllepsis
glass or optick glass in a straight line with the incident ray; and as there are a
sufficient supply of these direct rays proceeding from any object in any direction
agreeing with the laws of perspective that are transmitted through from any
point of an object in a direct line with the incident ray, which direct rays
alone are proper for distinct vision, and proves that all rays of light that are
refracted are not only become distorted, prismatick, and are enemies to but
likewise useless for distinct vision, being repugnant to that truth. To obviate
the defects of optical instruments which refracted light occasions, I have the
extream edges of the two surfaces of my syllepsis glasses truly paralel to cach
other, which when truly centered I cut off the prism from the glass, leaving
only such part of the centre of the glass as may be proper for a sufficient
quantity of those rays of light to be transınitted through as will be on direct
lines with the incident rays, according to the distance of the object or the
image of the object and the magnifying power required, preserving the laws
of perspective, (videlicet,) a straight line with the incident ray, and this strictly

page_text: to be observed by light transmitted through every or any optick glass according
to the instrument used to or the effect desired of it; I shut out all refracted
light that I possibly can, considering it imperfect and improper for distinct
vision. When and then the direct transmitted light from such syllepsis
glasses with the prism so cut off or obscured, together with radia of
the surfaces of such prepared syllepsis glasses, such glasses being first
duly and properly proportioned agreeable to the use or magnifying power
required, tellescopes, microscopes, opera glasses, spectacles, reading glasses,
reading, travelling desks and optical instruments in general, are or may be
rendered the most perfect by the simple application of such syllepsis glasses
being placed in frames, cells, or sockets, to be moveable or fixed as may bo
necessary, according to the use, effect, or magnifying power to be produced
by them. A syllepsis glass is one optick glass, and which fully answers the
end and effect of but is far superior to the late improved accromatic object
glass, exhibiting by its external shape or form such as when one convex and
one concave or two convex's and one concave are placed close together, which
is in effect and form but one syllepsis glass with the prism cut off; and by the
aforesaid manner of preparing and applying such syllepsis glass or glasses,
they answer to each other, so that all transmitted rays of light are or may be
preserved in direct lines with the incident ray and produce distinct vision.
And by this preparation of syllepsis glasses, and a due and proper application
thereof, optick instruments in general are or may be rendered perfect, as the
image transmitted through such syllepsis glass or glasses properly applied as
aforesaid will remain still distinct and undisturbed, although the said syllepsis
glasses which the said image is transmitted through shall be in continual
motion, and which no other optick glass will answer to or perform with accuracy
and distinctness.
In witness whereof, I, the said William Storer, have hereunto set my
hand and seal, this Tenth day of April, in the twenty-fourth 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 eighty-four.

page_text: AND BE IT REMEMBERED, that on the Tenth day of April, in the
year of our Lord 1784, the aforesaid William Storer came before our said
Lord the King in His Chancery, and acknowledged the Specification afore-
said, and all and every thing therein contained and specified, in form above
written. And also the Specification aforesaid was stampt according to the
tenor of the Statutes made for that purpose.
Inrolled the Tenth day of April, in the year of our Lord One thousand
seven hundred and eighty-four.