Notices to Correspondents.

We must beg the indulgence of many Correspondents for omitting to reply to them this holiday week.

H. B. C.'s paper, Impossibilities of History, in our next.

T. L. N. For the authorship of the Latin verse on Dr. Franklin, see our 5th Volume, pp. 17. 140. 549. 571.; and Vol. vi., p. 88.

J—g., The Editor, and another Correspondent. No.

M. W. Try a weaker solution of pyrogallic; that is, make the ordinary 3-grain to the ounce solution, and use one-third of that and one-third of plain water, and the results will probably be what you desire. The bath will keep for a long time, if kept free from dust, &c.

The extent which Photography occupies in our present Number will, we are sure, excuse us, in the eyes of several Correspondents. for the omission of their communications.

Our Eighth Volume is now bound and ready for delivery, price 10s. 6d., cloth, boards. A few sets of the whole Eight Volumes are being made up, price 4l. 4s.For these early application is desirable.

"Notes and Queries" is published at noon on Friday, so that the Country Booksellers may receive Copies in that night's parcels, and deliver them to their Subscribers on the Saturday.


COLLODION PORTRAITS AND VIEWS obtained with the greatest ease and certainty by using BLAND & LONG'S preparation of Soluble Cotton; certainty and uniformity of action over a lengthened period, combined with the most faithful rendering of the half-tones, constitute this a most valuable agent in the hands of the photographer.

Albumenized 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 AND 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.


SMEE'S BINOCULAR PERSPECTIVE PHOTOGRAPHS.—A full account of the mode of taking these extraordinary Likenesses in "Smee on the Eye," just published, price 5s.

HORNE, THORNTHWAITE & WOOD, 123. Newgate Street, London.


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, 289. 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.