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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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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 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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TO PARENTS, GUARDIANS, RESIDENTS IN INDIA, &c.--A Lady residing within an
hour's drive westward of Hyde Park, and in a most healthy and cheerful
situation, is desirous of taking the entire charge of a little girl, to
share with her only child (about a year and a half old) her maternal care
and affection, together with the strictest attention to mental training.
Terms, including every possible expense except medical attendance, 100l.
per annum. If required, the most unexceptionable references can be
furnished.

Address to T. B. S., care of MR. BELL, Publisher, 186. Fleet Street. {467}

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SPECTACLES.--WM