A NEW OR IMPROVED COMBINATION OF MICROSCOPIC PHOTOGRAPHS AND LENSES WITH CERTAIN PRECIOUS STONES OR IMITATIONS THEREOF
Year: 1861

page_text: LETTERS PATENT to Marc Antoine François Mennons, of the British and
Foreign Patent Offices, 39, Rue de l'Echiquier, Paris, in the Empire of
France, for the Invention of "A NEW OR IMPROVED COMBINATION OF
MICROSCOPIC PHOTOGRAPHS AND LENSES WITH CERTAIN PRECIOUS STONES OR
IMITATIONS THEREOF."-A communication from Louis Henri Bouillette and
Jean Amable Hyvelin, residing at No. 31, Rue Michel-le-Comte, Paris,
France
Sealed the 16th May 1862, and dated the 9th December 1861.
PROVISIONAL SPECIFICATION left by the said Marc Antoine François
Mennons, at the Office of the Commissioners of Patents, with his
Petition, on the 9th December 1861.
I, MARC ANTOINE FRANÇOIS MENNONS, of the British and Foreign Patent
Offices, 39, Rue de l'Echiquier, Paris, in the Empire of France, do hereby
declare the nature of the said Invention for "A NEW OR IMPROVED COM-
BINATION OF MICROSCOPIC PHOTOGRAPHS AND LENSES WITH CERTAIN PRECIOUS STONES
OR. IMITATIONS THEREOF," to be as follows:
This Invention consists in the application of microspopic photographs and
lenses or lenticular surfaces to such precious stones and imitations thereof as
possess a sufficient degree of transparency to allow the passage of the
'visual rays..

page_text: To this end the microscopic photograph is applied either directly or by
transfer to the under surface of a section of the gem, cut thus ). To this
surface is then adapted, by Canada balsam, Venicé turpentine, or other suitable
adhesive matter, the pyramidal counterpart c to the apex of which is
cemented a small magnifying lens formed thus . The complete gen
is then mounted in a ring, watch key, breast pin, or other setting, the point of
which is pierced to form eye piece in the axial line of the lens corresponding
with the microscopic object in the centre of the front plate.
Instead of adapting a separate lens as above, the apex of the gem-may, in
certain cases, be ground to a lenticular surface, but this process is generally
more difficult and less economical than that above described.
In certain cases the photograph, instead of being applied to the plane
*surface of the front plate, may be formed on a separate disc of transparent
matter, which is interposed between the sections of the gem and secured by
cement as above.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Marc Antoine François Mennons, in the Great Seal Patent
Office on the 29th May 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MARC
ANTOINE FRANÇOIS MENNONS, of the British and Foreign Patent Offices,
39, Rue de l'Echiquier, Paris, in the Empire of France, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Ninth day of December, in the year of our Lord
One thousand eight hundred and sixty-one, in the twenty-fifth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Marc Antoine François Mennons, Her special licence that I, the said
Marc Antoine François Mennons, my exécutors, administrators, and assigns,
or such others as I, the said Marc Antoine François Mennons, my executors,
administrators, and assigns, should at any time agree with, and-ño others, from-
time to time and at all times thereafter 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 "A NEW OR IMPROVED COMBINATION OF MICROSCOPIC

page_text: PHOTOGRAPHS AND LENSES WITH CERTAIN PRECIOUS STONES OR IMITATIONS THEREOF,"
(a communication from Louis Henri Bouillette and Jean Amable Hyvelin,
persons resident at No. 31, Rue Michel-le-Comte, Paris, France), upon the
condition (amongst others) that I, the said Marc Antoiné François
Mennons, 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 Marc Antoine François Mennons,
do hereby declare the nature of the 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 :-
:
This Invention consists in the, application of microscopic photographs and
lenses or lenticular surfaces 'to such precious stones and 'imitations, thereof as
possess a sufficient degree of transparency to allow the passage of the
visual rays..
To this end the microscopic photograph is applied either directly or by
transfer to the under surface of a section of the gem, cut thus
To this
surface is then adapted, by Canada balsam, Venice turpentine, or other suitable
adhesive matter, the pyramidal counterpart
<
to the apex of which is
cemented a small magnifying lens formed thus Q. The complete gem
is then mounted in a ring, watch key, breast pin, or other setting, the point of
5 which is pierced to form eye piece in the axial line of the lens corresponding
with the microscopic object in the centre of the front plate.
Instead of adapting a separate lens as above, the apex of the gem may, in
certain cases, be ground to a lenticular surface, but this process is generally
more difficult and less economical than that just described.
0 Or, again, the photograph, instead of being applied directly to the plane
surface of the front plate, may be formed on a separate disc of transparent.
matter, which is interposed between the sections of the gem, and secured by.
cement as above.

page_text: Having now described and ascertained the nature of the said Invention and
the manner in which it may be carried into effect, I declare that while
reserving the right to introduce such modifications in the details of execution
as experience may suggest, I claim and desire to secure by the above in part
recited Letters Patent, the application substantially as herein set forth of
microscopic photographs and lenses or lenticular surfaces to such precious
stones and imitations thereof as possess sufficient transparency for the passage
of the visual rays.
In witness whereof, I, the said Marc Antoine François Mennons, have
hereto set my hand and seal, this Twenty-second day of May, in the
year of our Lord One thousand eight hundred and sixty-two.
M. F. MENNONS. (L.S.)