The Optical Magic Lantern Journal (May 1891)

iv. Tho Optical Magic Lantern Journal and Photographio Enlarger, XYGEN Extracted from the Atmosphere by BRINS' PATENT PROCESS, absolutely tree from Chlorine or deleterious matter of any kind. Supplied at a few hours’ notice compressed in Weldless Steel Cylinders, at 120 atmospheres C1,800]bs.) on the square inch. XYGEN— 40,000 Cubic Feet in stock. XYGEN BLOW PIPES, for Soldering and Brazing, &c., for Mechanics, Electrical Engineers, Coppersmiths, Plumbers, Gla:sblowers, &c. XYGEN for Limelight Illumination, Magic Lanterns, Illuminated Advertising, &e. X YGEN — SPECIAL TERMS to Theatres and large Consumers. Tanks and bags are dispensed with, and back pressure and mixing ot gases rendered impossible. Explosions of Retorts and Chemicals are done away with. The Oxygen is cheaperand purer than that made from chlorate of potash, and has no corrosive action on metal fittings. NYLINDERS. Each cylinder is tested under a pressure CU of Two Tons (4,48(1bs.) on the square inch before being filled. ‘hese precautions render the use of compressed gases quite safe. To ensure that they have been observed when purchasing see that our name is stamped on both cylinder and valve. A Large Stock of Cylinders, from 25s, to 94s., according to size; Couplings, Keys, Gauges, Regulators, Valves, &c., always on hana. Agents inall Principal towns. Price Lists and all information on on application to (QHE MANCHESTER OXYGEN COMPANY, Ltd. F (Brins’ Patent), GREAT MARLBOROUGH &T., OXFORD RD., MANCHESTER. Manufaccurers and Compressors of all kinds of Gas. THE GUINEA DETECTIVE CAMERA. A Thoroughly Effective and Serviceable Quarter-Plate Camera. REQUIRES NO FOCUSSING. HAS AN ENGLISH ACHROMATIC LENS AND THREE DOUBLE SLIDES, PARTICULARS FREE FROM THE PATENTEE3 AND MANUFACTURERS, WALTER GRIFFITHS & CO., LIMITED, HIGHGATE SQUARE, BIRMINGHAM. ROUCH'S ‘“ KUREKA” HAND DETECTIVE CAMERA. Eulogised by Melton Prior, aries. TAYLOR, TAYLOR, & HOBSON. If reservoir is made detachable, 10s. each instrument extra. ; Quarter Plate, £2 10s. Awarded the only Medal for Hand Cameras at Crystal Palace Exhibition. W. W. ROUCH & Co., 180, Strand, London. *@tory Entrance 43, Norfolk Special War Artist to the “ Illustrated London News.’ Gives instantanegus pictures eminently adapted for the Optical Lantern, Book Illustrations, or Sketches for the Artist ; and is now in great demand by Tourists, Artists, Special Correspondents, and MissionIt differs from all others in its compactness, but is invaluable in this special feature, that when its contents of one dozen plates have been exposed the reservoir containing them may be removed IN OPEN DAYLIGHT, and a second, third, or fourth reservoir, each containing twelve or more plates, ray be inserted in succession, no dark tent for changing plates being now necessary. Lens, Camera, and all fittings of very highest class, and made on our premises. The Improved ‘‘Eureka’’ is covered by several Patents. Price—For Lantern size Plates, £5 17s. 6d.; Quarter Plates, £6 12s. 6d. Additional reservoirs litted—I.antern size, £2 5s.3 CORRECT EXPOSURE A CERTAINTY. BALLARD'S ACTINOMETER (Patent), An instrument for accurately measuring the actinic power of light by direct vision. Constructed on entirely novel principle. Extremely simple and absolutely reliable, as it indicates the actvad, not the probable, exposure necessary, Always ready for use. No prepared paper to spoil, vary in tint, cr run out. Very portable and easily adjusted. Suitable for any latitude, subject, or condition of light. Price, complete, with Instructions, 6:6. Of all Dealers in Photographic materials and Wholesale of SsLEWVIATHAN, LON DON.? (Trade Mark and Telegraphic Address.) Photographic Catalogue, 80 pages (Trade only).