TAKING PHOTOGRAPHIC IMPRESSIONS: OR PICTURES OF MICROSCOPIC OBJECTS BY REFLECTION, SUCH REFLECTION BEING EFFECTED BY THE COMBINED AID OF THE MISCROSCOPE AND CAMERA OBSCURA AND CAMERA LUCIDA, OR OTHER REPLECTORS THAT MAY BE EMPLOYED IN PLACE OF THE LATTER
Year: 1856

page_text: PROVISIONAL SPECIFICATION left by William Henry Olley at the
Office of the Commissioners of Patents, with his Petition, on the 15th
April. 1856.
I, WILLIAM HENRY OLLEY, of No. 2, Brabant Court, Philpot Lane, in the
City of London, Wine Merchant, do hereby declare the nature of the said
Invention for TAKING PHOTOGRAPHIC IMPRESSIONS: OR PICTURES OF MICROSCOPIC
OBJECTS BY REFLECTION, SUCH REFLECTION BEING EFFECTED BY THE COMBINED AID
OF THE MISCROSCOPE AND CAMERA OBSCURA AND CAMERA LUCIDA, OR OTHER
REPLECTORS THAT MAY BE EMPLOYED IN PLACE OF THE LATTER, to be as follows,
namely:-
The combination or conjoint application of the camera obscura and camera
lucida to the miscroscope, for the purpose of obtaining photographic: im-
pressions, or pictures of miscroscopic objects, by the reflection of natural or
artificial light; this combination being effected by fitting the four-sided
reflecting glass prism, commonly known as the camera lucida, on the eye piece
of the microscope, the cap by which it (the eye piece) is usually surmounted
being previously removed, and the body or tube of the instrument brought into
a horizontal position, and then placing over the said prism an inverted camera
obscura or darkened box, having a second box open at the lower end sliding
within it, the outer box or case of the camera having, moreover, a circular
aperture in front, corresponding to the circumference of the body or tube of the

page_text: microscope, so that the camera may be passed over and fit closely to the said
tube or body, so as entirely to exclude extraneous light. The inner box of the
camera has a groove running round it near the upper edge, in which groove a
camera slide or frame with back and moveable shutter, for receiving a collodion
plate or any other sensitive surface, accurately works. This frame, or a second
similar to it, also receives a plate of finely ground glass. Now, the camera, so
described, being properly adjusted above the four-sided prism or camera lucida
attached to the eye piece, and a microscopic mounting or object placed at a
proper focus before the object glass of the microscope, an image of such
object will be formed upon the ground glass plate of the camera frame above
by reflection from the prism, which image may be either increased or
diminished in area by raising or depressing the inner sliding box of the camera.
When the image is seen duly defined, the ground glass plate is removed and
another glass or other plate, coated with iodized collodion, or any other.
photographic preparations of collodion, or with any other compounds or
substances sensitive to light, substituted for it, either in the same frame or in
that before described; the frame is then introduced within the camera, the
shutter beneath the frame is drawn out, and the coated side of the prepared_
glass or other plate exposed for a suitable time to the action of the light
reflected by the camera lucida. The shutter of the frame after such exposition
is pushed in, and the picture, upon the removal of the prepared plate, is
developed by protosulphate of iron, gallic acid, or any other preparations that
may be deemed suitable for the purpose.
The Invention is applicable to the obtaining microscopic impressions, by
reflection, by the use of iodized silver plates, and every modification of the
daguerreotype process, albumenized photographic glass plates, calotype paper,
and all other papers or surfaces impressionable by light.
The Invention likewise includes, in addition to the four-sided prism or
camera lucida, plate glass and all other reflectors that may be employed for
producing an image upon collodion plates, or on any of the sensitive surfaces
above enumerated, or on others that may be rendered available for the purpose
or purposes herein specified.