nting Calotypes in large or small quantities,
either from Paper or Glass Negatives. Gentlemen who are desirous of
having good impressions of their works, may see specimens of Mr.
Delamotte's Printing at his own residence, 38. Chepstow Place,
Bayswater, or at

MR. GEORGE BELL'S, 186. Fleet 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. Camera for Developing in the open Country. GLASS BATHS
adapted to any Camera. Lenses from the best Makers. Waxed and Iodized
Papers, &c.

* * * * *

PHOTOGRAPHIC PICTURES.--A Selection of the above beautiful Productions
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 Chemist, 153. Fleet Street.

* * * * *

TO PHOTOGRAPHERS.--To be sold, a Second-hand Achromatic Portrait Lens by
Lerebour, 2-1/4 aperture, 7 inches focal length. Price 3l. 10s.

Apply to THOS. EGLEY, Bookseller, 35. Upper Berkeley Street West, Hyde
Park Square, where also Specimens of its performance may be seen.

* * * * *

PHOTOGRAPHIC PAPER.--Negativ