mbined with the most
faithful rendering of the half-tones, constitute this a most valuable agent
in the hands of the photographer.

Albumenised paper, for printing from glass or paper negatives, giving a
minuteness of detail unattained by any other method, 5s. per Quire.

Waxed and Iodized Papers of tried quality.

Instruction in the Processes.

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

*** Catalogues sent on application.

* * * * *

THE SIGHT preserved by the Use of SPECTACLES adapted to suit every variety
of Vision by means of SMEE'S OPTOMETER, which effectually prevents Injury
to the Eyes from the Selection of Improper Glasses, and is extensively
employed by

BLAND & LONG, Opticians, 153. Fleet Street, London.

* * * * *

PHOTOGRAPHIC CAMERAS.--OTTEWILL & MORGAN'S Manufactory, 24. & 25. Charlotte
Terrace, Caledonian Road, Islington. OTTEWILL'S Registered Double Body
Folding Camera, adapted for Landscapes or Portraits, may be had of A. ROSS,
Featherstone Buildings, Holborn; the Photographic Institution, Bond Street:
and at the Manufactory as above, where every description of Cameras,
Slides, and Tripods may be had. The Trade supplied.

* * * * *

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.

* * * * *

IMPROVEMENT IN COLLODION.--J. B. HOCKIN & CO., Chemists, 189. Strand, have,
by an improved mode of Iodizing, succeeded in producing a Collodion equal,
they may say superior, in sensitiveness and density of Negative, to any
other hitherto published; without diminishing the keeping properties and
appreciation of half-tint for which their manufacture has been esteemed.

Apparatus, pure Chemicals, and all the requirements for the practice of
Photography. Instruction in the Art.

THE COLLODION AND POSITIVE PAPER PROCESS. By J. B. HOCKIN. Price 1s., per
Post. 1s. 2d.

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ALLEN'S ILLUSTRATED CATALOGUE,