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. Science-gossip . High-Class Photographic Lenses, with Iris or otherDiaphragms. Illustrated Catalogue of Telescopes, Microscopes, &c. &c.,for stamp. Highest Class Micro°Objectives, also made onpremises, at Closest Prices. W. WRAY, North Hill, Highgate, LONDQN N. THE NATURALIST: {Originally founded iSs;;^.) A Monthly Journal of Natural History foi» the Northern Countiesof England, viz. :—Northumberland, Durham, Yorkshire, Lincoln-shire, Nottinghamshire, Derbyshire, Cheshire, Lancashire, West-moreland, Cumberland, and the Isle of Man. Conducted by—W. Denison Roebuck, , with the assistanceof J. Gilbert Baker. ; W. Eagle Clarke, , ; Alfred Barker, , ; Charles P. Hobkirk, ; George T. Porritt, , ; and W. BarwellTurner, Monthly, Sixpence ; by post, Sevenpenee. Annual Subscription, Six Shillings and Sixpence, post free. All Communications to be addressed—The Editors of TheNaturalist, 259, Hyde Park Road, APPARATUS. Of the Highest Quality and Finish only. As supplied by tts to Goicrnment and the leading Hospitals andX-Ray Workers throughout the world. We are the actual Manufacturers, and Guaranteeevery Coil against breaking down. ?J^ Call or write for our New Illustrated List, withTestimonials and plainly worded Illustrated In-structions upon how to work in free to Readers of Science-Gossip. HARRY W. COX, Ltd., 10, 11, 28 Gursitor Street, CHANCERY LANE, LONDON. Radiographs taken for Scientific a7id MedicaljVIen, and Dcmo?istrations given. SCIENCE-GOSSfP. AnimatedPhotoji^raphy
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
