Notices to Correspondents.
We are compelled to postpone until next week many interesting articles which are in type, and many Replies to Correspondents.
Mr. Riley's Reply to the Rev. Mr. Graves' notice of Hoveden did not reach us in time for insertion this week.
I. A. N. (93rd Highlanders.) Several correspondents, as well as yourself, complain of the difficulty of obtaining amber varnish. There are several Eastern gums which much resemble amber, as also a substance known as "Highgate resin." Genuine amber, when rubbed together, emits a very fragrant odour similar to a fresh lemon, and does not abrade the surface. The fictitious amber, on the contrary, breaks or becomes rough, and has a resinous turpentine-like smell. Genuine amber is to be obtained generally of the tobacconists, who have often broken mouth-pieces by them: old necklaces, now out of use, are sold at a very moderate price by the jewellers. The amber of commerce, used in varnish-making, contains so much impurity that the waste of chloroform renders it very undesirable to use. The amber should be pounded in a mortar, and, to an ounce by measure of chloroform, add a drachm and a half of amber (only about one-fourth of it will be dissolved), and this requires two days' maceration. It should be filtered through fine blotting-paper. Being so very fluid, it runs most freely over the collodion, and, when well prepared and applied, renders the surface so hard, and so much like the glass, that it is difficult to know on which side of the glass the positive really is. The varnish is to be obtained properly made at from 2s. to 2s. 6d. per ounce; and although this appears dear, it is not so in use, so very small a portion being requisite to effectually cover a picture; and the effects exceed every other application with which we are acquainted,—to say nothing of its instantaneously becoming hard, in itself a most desirable requisite.
—— (Islington). Your note has been mislaid, but in all probability the spots in your collodion would be removed by dipping into the bottle a small piece of iodide of potassium. Collodion made exactly as described by Dr. Diamond in "N. & Q.," entirely answers our expectations, and we prefer it, for our own use, to any we have ever been able to procure.
J. M. S. (Manchester) shall receive a private communication upon his Photographic troubles. We must, however, refer him to our advertising columns for pure chemicals. Ether ought not to exceed 5s. 6d. the pint of twenty ounces.
A few complete sets of "Notes and Queries," Vols. i. to vi., price Three Guineas, may now be had; for which 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.
This day is published,
PICTORIAL ILLUSTRATIONS of the Catalogue of Manuscripts in Gonville and Caius College Library. Selected by the REV. J. J. SMITH. Being Facsimiles of Illumination, Text, and Autograph, done in Lithograph, 4to. size, with Letter-press Description in 8vo., as Companion to the published Catalogue, price 1l. 4s.
A few copies may be had of which the colouring of the Plates is more highly finished. Price 1l. 10s.
Cambridge: JOHN DEIGHTON.
London: GEORGE BELL.
OFFICERS' BEDSTEADS AND BEDDING.
HEAL & SON beg to call the Attention of Gentlemen requiring Outfits to their large stock of Portable Bedsteads, Bedding, and Furniture, including Drawers, Washstands, Chairs, Glasses, and every requisite for Home and Foreign Service.
HEAL & SON, Bedstead and Bedding Manufacturers, 196. Tottenham Court Road.
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.
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.
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.
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 Athenæum, 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.
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 Depôt for Turner's, Whatman's, Canson Frères', La Croix, and other Talbotype Papers.
Pure Photographic Chemicals.
Instructions and Specimens in every Branch of the Art.
GEORGE KNIGHT & SONS, Foster Lane, London.
PHOTOGRAPHIC PAPER.—Negative and Positive Papers of Whatman's, Turner's, Sanford's, and Canson Frères' make, Waxed-Paper for Le Gray's Process. Iodized and Sensitive Paper for every kind of Photography.
Sold by JOHN SANFORD, Photographic Stationer, Aldine Chambers, 13. Paternoster Row, London.
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.