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THE CHEMICAL NEWS WITH WHICH IS INCORPORATED THE Bsuift CHEMICAL GAZETTE. \JVilliam Crookes. No. 9.] } Saturday, February 4, T&O. JrrMsBM CONTENTS. PAGE Scientific and Analytical Chemistry On the Estimation of Phosphoric Acid in Manures, Coprolites, Bone Ash, and similar Com mercial Substances, bp Francis Sutton - - - -97 Technical Chemistry Extracting Silver from its Ores - 98 The Compensation Self-registering Maximum Thermometer •• -98 ^blmlisements. FARADAY’S CHRISTMAS LECTURES at the ROYAL! INSTITUTION. The Fifth Lecture is contained in the’present number Jof the “CHEMICAL NEWS.” shall insert them weekly until the series is concluded. We Complete in Three Parts, with numerous Illustrations, 21. G.s. 6d. ELEMENTS OF CHEMISTRY. Pharmacy, Toxicology, Ac. A new Method of Estimating the Quinine in Cincona Barks, by MM. Glenard and Guillier- MOND - - - - - 99 Adulteration of Rhubarb - -100 The Comparative Value of diffe rent Species of Aconite - -100 DR. FARADAY'S LECTURES AT THE ROYAL INSTITU TION. V. Magnetism—Electricity 100 Proceedings of Societies Chemical Society - - ' 103 University of London- - -104 Notices of Books and Patents The Radical Theory in Chemistry, by J. J. Griffin, F.C.S. -105 Chemical Recreations: same Author 105 Improvements in Vidcanising and Colouring Caoutchouc, fyc. -106 Correspondence The Atomic Theory - - -107 Chemical Notices from foreign Sources- - - - -107 Scientific Notes and Queries Determination of the Amount of Alcohol in Wine or other Alcoholic Fluids — Purification of Water by the use of the Oxide of Manganese—The Metallic- iron Water-purifying Patent— Stannate of Soda - - -108 laboratory Memoranda Estimation of Mixtures of Acids or Alkalies in Solution - -108 Miscellaneous Effects of Arsenical Papers—• Alum Lozenges - - -108 Answers to Correspondents -108 By WILLIAM ALLEN MILLER, M.T). F.R.S., Professor of Chemistry, King’s College, London. London: JOHN W. PARKER & SON, West Strand, W. C. CHEMISTRY-UNITARY NOTATION. Just published, price 6d. ready gummed, a complete SET OF LABELS FOR REAGENTS. Also, on a Card, price 3d. or on Paper, price 2d. A TABLE OF ATOMIC WEIGHTS OF XHK EIIMKSIS. The above are specially intended to accompany Messrs. N0RTHCOTE and CHURCH’S “ MANUAL OF ANALYSIS ” (Van Voorst). A considerable reduction in price will be made to purchasers of 25 or more. OXFORD, and 377 STRAND, LONDON: J. II. and J. PARKER. Next Week, One large Volume 8vo. 2D. cloth. \ CYCLOPEDIA of the JLJL PHYSICAL SCIENCES, comprising Acoustics, Astronomy, Dynamics, Electricity, Heat, Hydrodynamics, Magnetism, Mathematics, Meteorology, Optics, Pneumatics, Statics. i Edited by John Pringle Nichol, LL.D., Pro- i fessor of Practical Astronomy in the Univer- ! sity of Glasgow. Assisted by Sir W. Rowan Hamilton, Dr. Robinson, Professors Rankine, Stokes, Taylor, and Thomson, and other con tributors. Illustrated by numerous Maps, En gravings, and Woodcuts. Second edition, re vised and greatly enlarged. London: RICHARD GRIFFIN & Company, Stationers’ Hall Court and Glasgow. A PRIZEMAN in CHEMIS- TRY of the Society of Arts, as Labora tory Assistant, or some similar capacity. Can construct Apparatus, and speaks German.— A. V., Ilayner’s, Dean Street, Soho, W. <QuauUo uilum fndcnfcinus parent? chem Js , p IrmRr, haver and litho(W^ VVVj v H. SILVERLOCK, MEDICAL LABEL WAREHOUSE, WARDROBE TERRACE, L0ND3N. E.C. X.. OERTLING. piIEMICAL AND ASSAY BALANCES.—The Council Medal of the Great Exhibition of 1851, and the First- class Medal of the Paris Exhibition of.1855, have been awarded to L. Oertling, for the superior quality of his Balances. They are made of all sizes, from the largest, capable of carrying 1000 oz. in each pan, to the most delicate Assay Balance. English and French Weights and Measures accurately adjusted. Catalogues forwarded on application. 12 Store Street, Bedford Square, London, W.C,