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THE CHEMICAL NEWS Edited by\ WITH WHICH IS INCORPORATED THE CHEMICAL GAZETTE. \William Crookes. No 18 1 ( Copyright of the ) io- J f Contents reserved, j Saturday, April 7, i860. {7 CONTENTS. PAGE Scientific and Analytical Chemistry Notes on Boiling Points,by A rthur H. Church, F.C.S. - - 205 On Osmious Acid and the Position of Osmium in the List of Ele ments, by J. W. Mallet. - 206 Technical Chemistry The Specific Gravity of Mixtures ’ ilci of Alcohol and Water - 207 Pharmacy, Toxicology, Ac. On the Detection and Estimation of Phosphorus and Phosphorous Acid in cases of Poisoning, by Prof. SCHEERER - 207 Proceedings of Societies JRoyal Institution : On Dia monds, by Nevil Story Mas- KELYNE, M.A. - 208 Chemical Society: Anniversary Meeting - - - - - 213 Notices of Patents Hydro-carburation of Heat — Ma nufacture of Metallic Compounds or Alloys— Utilisation of Madder Residues - - - - 214 Correspondence Chemical Nomenclature - - 214 Salt Efflorescences - - -215 Chemical Notices from Foreign Sources - - - - - 215 Scientific Notes and Queries Electrical Decomposition of Com pounds of Nitrogen — Estimation of Carbon by Combustion - - 216 Miscellaneous A Doctor and his Assistant — Malleable Iron - - - -216 Answers to Correspondents 116 ANALYTICAL CHEMIST. A GENTLEMAN, specially -LJL experienced in the EXAMINATION of FOOD, Sec. &c. is open to an Engagement either in a Manufactory, a Private Laboratory, or as Demonstrator, A*c. to an Institution. Highest testimonials. — Address, F. C. S. Mrs. Kemp, Stationer, 27 Queen’s Hoad West, Chelsea, S.W. NOTICE. Subfcribers and the trade are refpeflfully informed that the back numbers of the Chemical News have been reprinted, and complete lets may now be obtained on application at the office. Owing to prefs of matter we are compelled to defer the infertion of Dr. Odling’s Leiturc on Acids and Salts until next week. Dr. Lankefter’s Courle of I.eftures on the Animal Produft Collection in the South Kenfington Mufeum, Mr. Abel’s Lefture on Some Refults of the Alfociation of Heat with Chemical Affinity Praftically Applied, and other important Ledtures are in preparation and will (hortly appear. * Now Ready, Second Edition, price &s. 6d. rPFIE DICTIONARY of CHE- JL MISTRY. With its application to mine ralogy. physiology and the arts. By ROBERT DUNDAS THOMSON, M.D., F.R.S. L. & E. F.C.S. Professor of Chemistry at St. Thomas’s Hospital College, London. “Ilts completeness and correctness recommend the Dictionary of Chemistry.”—Atheruvum “ In a’form most useful for reference and suit able for study.”—Literary Gazette. “ A practical publication in the highest degree valliable.”—Mining Journal. “ The best compendium of chemistry that we have yet seen.”—Lancet. RICHARD GRIFFIN & CO. London and Glasgow. F IBRE S.—Persons possessing rare or interesting FIBRES or HAIRS (of animal or vegetable origin) in natural state, or peculiarly prepared, will oblige the adver tiser by sending small specimens (free) for chemical and microscopical examination, to W. 1.. S., office of the Chemical News. SCIENTIFIC PRESENTS, O ELEMENTARY COLLECTIONS, to I facilitate the study of Geology, Mineralogy, and l Conchology, can be had at 2, ft, 10, 20, ftO, to 100 guineas ; also single Specimens of Minerals, Rocks, Fossils, and Recent Shells, Geological Maps, Hammers, Blowpipes, all the Recent : Publications, &c. of J. TENNANT, Geologist, 149 Strand. Practical instruction is given in Geology and Mineralogy by Mr. Tennant, at 49 Strand, W.C. S EA. — WANTED a few SUR- GEONS (with a knowledge of Military Surgery preferred), to Register their Names, at “ Passengers’ Agency Office,” 10 Warnford Court, Throgmorton Street. London, E.C., for Appointments in Ships and Steamers to all parts of the world. A N EXPERIENCED CHE- MIST, who has been employed for some years in Print, Chemical, and other Works, and three years in the Drug trade, is desirous of an engagement or partnership. Address W. J., 31 Rumford Street, Manchester. COMMERCIAL AND TECHNICAL ANALYSES. GENTLEMAN connected with the EDITORIAL DEPART- MENT of the CHEMICAL NEWS offers his services to Metallurgists, Chemical Manufacturers, Dvers, Manure-makers, Agriculturists, &c. as ANALYST and GENERAL SCIENTIFIC ADVISER. ADULTERATIONS detected in Food and other Articles of Domestic Consumption. Address CHEMICUS, Office of the Chemical News, Red Lion Court, Fleet Street, London, E.C. A CEORCE KNIGHT AND SONS, MECHANICS AND MANUFACTURERS OF CHEMICAL A Y II PHILOSOPHICAL APPAR AT18 Suited to the Requirements of Manufacturers, Experimentalists, Naturalists, and Teachers of Natural Philosophy, Metallurgists, and Wholesale and Retail Dealers in the various Metals, Ores, and Minerals employed in the Arts. Pure Tests and Re-agents. Publishers of many Useful and Practical Scientific Works Just published “ ELECTROTYPE MANIPULATION.” Part I. New Edition. Price Is. By C. V. WALKER, F.It.S., &c. &c. t GEORGE KNIGHT & SONS, 2 Foster Lane, Cheapside, London.