lington.

T. OTTEWILL (from Horne & Co.'s) begs most respectfully to call the
attention of Gentlemen, Tourists, and Photographers, to the superiority of
his newly registered DOUBLE-BODIED FOLDING CAMERAS, possessing the
efficiency and ready adjustment of the Sliding Camera, with the portability
and convenience of the Folding Ditto.

Every description of Apparatus to order.

* * * * *

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.

* * * * *

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 Depot for Turner's, Whatman's, Canson Freres', La Croix, and other
Talbotype Papers.

Pure Photographic Chemicals.

Instructions and Specimens in every Branch of the Art.

GEORGE KNIGHT & SONS, Foster Lane, London.

* * * * *

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 _Athenaeum_, 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.

* * * * *

PHOTOGRAPHIC PAPER.--Negative and Positive Papers of Whatman's Turner's,
Sanford's, and Canson Freres' 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, L