*.* That these machines have been adopted, _to the exclusion of all others_, in establishments of such repute as those of Albert, of Munich, and the “Phototypisches Institute” of Berlin, are facts of the greatest significance. PRICES AND PARTICULARS ON APPLICATION TO HUGO KOCH, Leipzig-Connewitz, GERMANY, OR BEESLEY & CO., YORK PASSAGE, BIRMINGHAM. SCHMIERS, WERNER AND STEIN, MANUFACTURERS OF PRINTING MACHINERY [Illustration] OUR COLLOTYPE MACHINES have now been introduced for upwards of twelve years, during which period they have been adopted by the most renowned Collotype establishments in all countries. They are manufactured in four sizes, with all recent improvements, and may be ordered either with or without masking frames, the utmost satisfaction being guaranteed. They may be utilised for Lithographic Printing. Litho Steam Machines in Five sizes. Bronzing Machines in Two sizes. Further information in reply to all questions on application to SCHMIERS, WERNER & STEIN, DÖSENER WEG, LEIPZIG. _ESTABLISHED 1823._ BERGER & WIRTH, LEIPZIG, GERMANY, Ink Manufacturers. SPECIALITIES— COLLOTYPE INKS In all Shades. PRICES AND SAMPLES _FORWARDED UPON APPLICATION_. [Illustration] THE MAWSON “Photo-Mechanical” Plates ARE SPECIALLY MADE FOR PHOTO-LITHOGRAPHERS, PHOTO-ETCHERS & COPYING. * * * * * Collodions, Varnishes, Chemicals, and other requisites for Photo-Engravers, etc. * * * * * MAWSON & SWAN, 33, SOHO SQUARE, LONDON, W., AND 15, Mosley Street, NEWCASTLE-ON-TYNE. GELATINE. NELSON’S PHOTOGRAPHIC GELATINE IS RECOGNISED AS THE BEST for all Photographic purposes. No. 1.—FOR DRY PLATES. No. 2.—FOR CARBON PROCESS. Nelson’s “Special X Opaque,” for Dry Plates. Sold Retail by all Dealers in Photographic Materials. Wholesale by the Manufacturers— GEO. NELSON, DALE and CO., LIMITED, 14, DOWGATE HILL, LONDON, E.C. EASTMAN’S STRIPPING FILMS [Illustration] Produce the most perfect Reversed Negatives for Collotype and Photo-Lithography, and, when used in =EASTMAN’S ROLLER SLIDES=, reduce the bulk and weight immensely. EASTMAN’S PERMANENT BROMIDE PAPER. EASTMAN’S TRANSFEROTYPE PAPER. The Eastman Dry Plate & Film Co., 115, OXFORD STREET, LONDON, W. AN INTRODUCTION TO THE SCIENCE AND PRACTICE OF PHOTOGRAPHY: BY CHAPMAN JONES, F.I.C., F.C.S., DEMONSTRATOR OF PRACTICAL CHEMISTRY IN THE NORMAL SCHOOL OF SCIENCE AND ROYAL SCHOOL OF MINES; MEMBER OF THE PHOTOGRAPHIC SOCIETY OF GREAT BRITAIN, &C. Cloth, price 3/6; post free, 3/10-1/2. Paper Covers, 2/6; post free, 2/10-1/2; ILIFFE & SON, 3, St. Bride St., Ludgate Circus, London, =E.C.= THE BEST =FIRST BOOK= FOR PHOTOGRAPHERS TO BE HAD.