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 APPARATUS MANUFACTORY, Charlotte Terrace, Barnsbury Road,
Islington.

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.

* * * * *

PHOTOGRAPHIC PICTURES.--A Selection of the above beautiful Productions
(comprising Views in VENICE, PARIS, RUSSIA, NUBIA, &c.) 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.

*** Catalogues may be had on application.

BLAND & LONG, Opticians, Philosophical and Photographical Instrument
Makers, and Operative Chemists, 153.