Nature . R. Sc J. BECK, Lta., 68 CORNHILL, LONDON, THE MINIATURE SPECTROSCOPE. This instrument will show many of Fraunhofers lines, thebright lines of the metals and gases, and the absorption bands incoloured gases, crystals, or liquids. Price, with Plain Slit, £\ 2s. ; ditto, with Adjustable Slit inMorocco Case, £i 14J. ; ditto, with Achromatic Lens, &c.,in Morocco Case, £2 6s. Illustrated Catalogue of Spectroscopes, Post Free. JOHN BROlVN I N G, MANUFACTURING OPTICIAN, 63 STRAND, LONDON, THE TOURISTS ANEROID. (WHITESIDE-COOKS.). For Measuring Altitudes without Calculation. New Illu
Nature . R. Sc J. BECK, Lta., 68 CORNHILL, LONDON, THE MINIATURE SPECTROSCOPE. This instrument will show many of Fraunhofers lines, thebright lines of the metals and gases, and the absorption bands incoloured gases, crystals, or liquids. Price, with Plain Slit, £\ 2s. ; ditto, with Adjustable Slit inMorocco Case, £i 14J. ; ditto, with Achromatic Lens, &c.,in Morocco Case, £2 6s. Illustrated Catalogue of Spectroscopes, Post Free. JOHN BROlVN I N G, MANUFACTURING OPTICIAN, 63 STRAND, LONDON, THE TOURISTS ANEROID. (WHITESIDE-COOKS.). For Measuring Altitudes without Calculation. New Illustrated Price Lists Free by Post. Made only by NEGRETTI & ZAMBRA, SCIENTIFIC INSTRUMENT MAKERS to THE QUEEN, 38 HOLBORN VIADUCT, Sff/)/»C//fS; 45 CORNHILL; 122 REGENT STREET. NEGRETTI & Z.\MKK.\ S ?• Illustrated Catalogue, 603 Pages, 12CO Eiisravings, Price v. <xi. Telephone : No. 6583. Telegraphic .\dtiress : NeoBETTI, London. NA TURE [November 17, i! THE DAVY FARADAY RESEARCH LABORATORY OF THE ROYAL INSTITUTION. DIRECTORS: The Right flon. LORD RAVLEIGH, , , Professor DEWAR, , , Dr. ALEXANDER SCOTT. MA., This Laboratory, founded by X\x. Ludwig Mond, , as a Memorial?df Davy and Faraday for ihe purpose of promoting original research in•Pure and Physical Chemistry, will be open during ilie following Terms :— Michaelmas Term.—Monday, October 3, 10 Saturday, December Term.—Monday, January g, to Saturday, March 25. Easter Term.—Monday, April 17,
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
