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{275} ROSS'S PHOTOGRAPHIC PORTRAIT AND LANDSCAPE LENSES.--These lenses give
correct definition at the centre and margin of the picture, and have their
visual and chemical acting foci coincident.
_Great Exhibition Jurors' Reports_, p. 274.
"Mr. Ross prepares lenses for Portraiture having the greatest intensity yet
produced, by procuring the coincidence of the chemical actinic and visual
rays. The spherical aberration is also very carefully corrected, both in
the central and oblique pencils."
"Mr. Ross has exhibited the best Camera in the Exhibition. It if furnished
with a double achromatic object-lens, about three inches aperture. There is
no stop, the field is flat, and the image very perfect up to the edge."
Catalogues sent upon Application.
A. ROSS, 2. Featherstone Buildings, High Holborn.
* * * * *
TO PHOTOGRAPHERS.--MR. PHILIP DELAMOTTE begs to announce that he has now
made arrangements for printing Calotypes in large or small quantities,
either from Paper or Glass Negatives. Gentlemen who are desirous of having
good impressions of their works, may see specimens of Mr. Delamotte's
Printing at his own residence, 38. Chepstow Place, Bayswater, or at
MR. GEORGE BELL'S, 186. Fleet Street.
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PHOTOGRAPHY.--XYLO-IODIDE OF SILVER, prepared solely by R. W. THOMAS, has
now obtained an European fame; it supersedes the use of all other
preparations of Collodion. Witness the subjoined Testimonial.
"122. Regent Street
"Dear Sir,--In answer to your inquiry of this morning, I have no
hesitation in saying that your preparation of Collodion is incomparably
better and more sensitive than all the advertised Collodio-Iodides,
which, for my professional purposes, are quite useless when compared to
yours.
"I remain, dear Sir,
"Yours faithfully,
"N. HENNEMAN.
Aug. 30. 1852.
to Mr. R.W. Thomas."
MR. R. W. THOMAS begs most earnestly to caution photographers against
purchasing impure chemicals, which are now too frequently sold at very low
prices. It is to this cause nearly always that their labours are unattended
with success.
Chemicals of absolute purity, especially prepared for this art, may be
obtained from R. W. THOMAS, Chemist and Professor of Photography, 10. Pall
Mall.
N.B.--The name of Mr. T.'s preparation, Xylo-Iodide of Silver, is made use
of by unprincipled persons. To prevent imposition each bottle is stamped
with a red label bearing the maker's signature.
* * * * *
PHOTOGRAPHIC PICTURES.--A Selection of the above beautiful Productions may
be seen at BLAND & LONG'S, 153. Fleet Street, where may also be procured
Apparatus of every Description, and pure Chemicals for the practice of
Photography in all its Branches.
Calotype, Daguerreotype, and Glass Pictures for the Stereoscope.
BLAND & LONG, Opticians, Philosophical and Photographical Instrument
Makers, and Operative Chemists, 153. Fleet Street.
* * * * *
PHOTOGRAPHY.--HORNE & CO.'S Iodized Collodion, for obtaining Instantaneous
Views, and Portraits in from three to thirty seconds, according to light.
Portraits obtained by the above, for delicacy of detail rival the choicest
Daguerreotypes, specimens of which may be seen at their Establishment.
Also every description of Apparatus, Chemicals, &c. &c. used in this
beautiful Art.--123. and 121. Newgate Street.
* * * * *
PHOTOGRAPHY.--Collodion (Iodized with the Ammonio-Iodide of Silver).--J. B.
HOCKIN & CO., Chemists, 289. Strand, were the first in England who
published the application of this agent (see _Athenæum_, Aug. 14th). Their
Collodion (price 9d. per oz.) retains its extraordinary sensitiveness,
tenacity, and colour unimpaired for months: it may be exported to any
climate, and the Iodizing Compound mixed as required. J. B. HOCKIN & CO.
manufacture PURE CHEMICALS and all APPARATUS with the latest Improvements
adapted for all the Photographic and Daguerreotype processes. Cameras for
Developing in the open Country. GLASS BATHS adapted to any Camera. Lenses
from the best Makers. Waxed and Iodized Papers, &c.
* * * * *
Just published, price 1s., free by Post 1s. 4d.,
The WAXED-PAPER PHOTOGRAPHIC PROCESS of GUSTAVE LE GRAY'S NEW EDITION.
Translated from the French.
Sole Agents in the United Kingdom for VOIGHTLANDER & SON'S celebrated
Lenses for Portraits and Views.
General Depôt for Turner's, Whatman's, Canson Frères', La Croix, and other
Talbotype Papers.
Pure Photographic Chemicals.
Instructions and Specimens in every Branch of the Art.
GEORGE KNIGHT & SONS, Foster Lane, London.
* * * * *
PHOTOGRAPHIC PAPER.--Negative and Positive Papers of Whatman's, Turner's,
Sanford's, and Canson Frères' make. Waxed-Paper for Le Gray's Process.
Iodized and Sensitive Paper for every kind of Photography.
Sold by JOHN SANFORD, Photographic Stationer, Aldine Chambers, 13.
Paternoster Row, London.
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