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AUGUST 27, 1880.] THE PHOTOGRAPHICENEWS. vii ANOTHER REVOLUTIONARYPOWER IN PHOTOGRAPHY. (GELATINE). Manufactured on my own Pre- mines, 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. 7 9 “THE PALL MALL PLATIS 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 he 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, S/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 IAUBY TEXTILE FABRIC. Price, 10s. per yard, about 46 in- X 36 in. Post Free, in round Tubes each containing J yard, or J yard, and may be had in lengths of 12 yards. r For Prices of other apparatus, including Dry Plate Boxes of superior construction, Chemicals, &c„ &c„ see Catalogue of pages is" or Jam. under the name of ‘ Liquid Ruby,’ A double coating upon glass forms, when examined with the Spectroi p , RICHARD W. THOMAS, WHOLESALE AND EXPORT CHEMIST, MANUFACTURER OF PURE PHOTOGRAPHIC CHEMICALS AND PREPARATIONS, io, PALL MALL, LONDON-