ery kind of Photography.

Sold by JOHN SANFORD, Photographic Stationer, Aldine Chambers, 13.
Paternoster Row, London.

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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.

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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.

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

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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 the 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.

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PHOTOGRAPHIC SCHOOL.--ROYAL POLYTECHNIC INSTITUTION.

The SCHOOL is NOW OPEN for instruction in all branches of Photography, to
Ladies and Gentlemen, on alternate days, from Eleven till Four o'clock,
under the joint direction of T. A. MALONE, Esq., who has long been
connected with Photography, and J. H. PEPPER, Esq., the Chemist to the
Institution.

A Prospectus, with terms, may be had at the Institution.

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CLERICAL, MEDICAL, AND GENERAL LIFE ASSURANCE SOCIETY.

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