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September 24, 1880.] THE PHOTOGRAPHIC NEWS. vii ANOTHER REVOLUTIONARY POWER IN PHOTOGRAPHY. PLATES (GELATINE). Manufactured on myown Pre- mises, in a Building speci ally constructed for their prepa ration. Each batch is most carefully tested under my own per ¬ sonal supervi sion. I am therefore able to state, that my Signature at tached to the Label which protects each Box is a guar antee of their good qualities. TRADE MARK. » “THE PALL MALL PLATES.” PROSPECTUS POST TREE ON APPLICATION. THOMAS’S LIQUID RUBY. An invaluable Preparation for coating either paper or glass, producing at once a screen that cuts off all the actinic rays of light, by which means Gelatine Plates of the most sensitive kind can be worked with comfort. It stands the Spectroscope test perfectly, better than he glass known as non-actinic, which, from its variable quality, has always been a source of trouble and uncertainty. Sold in 2-oz. Sample Bottles, at 1- each; 5.oz Bottles, 2/6; 10-oz., 5/-; 20-oz., 10/-. Full Instructions for Use accompany each Bottle. THOMAS’S RUBY PAPER, TRANSLUCENT, Forms with one thickness of glass coated with Thomas’s Liquid RUBY, for use in a strong light, a perfect adiactinic medium. Post free, per Sheet, 23in. X 18in., Is.; per Quire, 22s. THOMAS’S RUBY TEXTILE FABRIC. 4 new Medium or Screen for cutting off all the actinic rays of light. It stands the Spectroscope test perfectly, and gives a good ligh of the proper colour. A very superior article to that hitherto sold for the same purpose. For Gelatine Work it is invaluable. Price, 10s. per yard, about 46 in- X 36 in- Post Free, in round Tubes each containing } yard, or J yard, and may be had in lengths of 12 yards. For Prices of other apparatus, including Dry Plate Boxes of superior construction, Chemicals, &c., &c., seo Catalogue of 80 ’pages sent free on receipt of six stamps. PRESS OPINION.—British Journal of Photography, Jan. 30th,lSS0.—“l<Lr. R. W. THOMAS has introduced a very elegant and useful preparation under the name of ‘ LIQUId Ruux,‛ A double coating upon glass forms, when examined with the Spectroscope, one of the safest colours we have examined.” RICHARD W. THOMAS, WHOLESALE and export chemist, manufacturer [OF PURE PHOTOGRAPHIC CHEMICALS AND PREPARATIONS, 10, PALL MALL, LONDOI.
