ROYAL SOCIETY OF ARTS. Monday, February 1, 8 p.m. (Cantor Lecture.) H. P. Shapland, A.R.I.B.A., late Editor of the Cabinetmaker, "The Decoration of Furniture." (Lecture III.) Wednesday, February 3, 8 p.m. (Ordinary Meeting.) Sir Edward John Russell, O.B.E., D.Sc., F.R.S., Director, Rothamsted Experimental Station, "Investigations in Agricultural Science at Rothamsted." The Rt. Hon. Lord Clinton, Chairman, Lawes Agricultural Trust, will preside. SOCIETY OF PUBLIC ANALYSTS AND OTHER ANALYTICAL CHEMISTS. The Ordinary Monthly Meeting of the Society will be held immediately following the Annual General Meeting, when the following papers will be read : "The Determination of Copper in Vegetables." By L. H. Lampitt, D.Sc., F.I.C., and E. B. Hughes, M.Sc., F.I.C. "Arsenic in Apples." By H. E. Cox., M.Sc., Ph.D., F.Í.C. "The Titration of Thallous Salts by Potassium Iodate." By A. J. Berry, M.A. "The Hot Springs at Nasavusavu." By C. H. Wright, M.A., F.I.C. New Patents. These particulars of New Patents of interest to Readers have been selected from the Official Journal of Patents, and are published by special permission of the Controller of His Majesty's Stationery Office. Latest Patent Applications. 505. Coley, H. E.-Manufacture of barium sulphide and barium hydroxide. January 7th. 507. Coley, H. E.-Reduction of sulphates. January 7th. 299.-L. G. Farbenindustrie Akt-Ges. 183. Lilly & Ci., E.-Process of ob- Specifications Published. January 244,895.-Badische Anilin & Soda Fabrik. -Manufacture and production of carbonyl compounds. 244,924. Singh, P., and Majithia, S. K. S. -Process for the refining of saccharine liquids. 244,951.-Dickens, C.-Chemical product resulting from a reaction between barium and a metal of the sulphur group, and its method of manufacture. 234,074.-Rhodin, B. E. F.-Process for extracting or refining magnesium. Abstract Published. 243,192. Superphosphate.-Hyde, A. C., Perivale Lodge, Perivale, Ealing, London. Calcium superphosphate is made by mixing finely ground calcium phosphate in the form of a dust cloud with a fine spray of sulphuric acid which may be of 1.84 specific gravity or somewhat weaker. The product is usually sufficiently dry to be packed into bags, but when a weaker acid is used, some drying may be necessary. The temperature employed may be above or below normal. The Latest TRADE MARKS This list of Trade Marks of interest to Readers has been selected from the Official Trade Marks Journal, and is Published by permission of the Controller of His Majesty's Stationery Office. 464,554.-Chemical substances used in manufactures, photography, or philosophical research and anticorrosives.-The Harvie Corporation, Ltd., Broadway Buildings, Broadway, Westminster, London, S.W.1. January 13th. ZOVALENE. 458,597.-Chemical substances prepared for use in Medicine and Pharmacy.E. W. Baker, 36, North Road, Holloway, London, N.7. January 13th. DIASTATIC PRODUCTS. The proprietor of Patent No. 3096/13, which relates to PRODUCING DIASTATIC PRODUCTS, desires to sell the patent or to grant Licenses on reasonable terms, to ensure the full development and practical working in this country. Address :-Phillips's, Chartered Patent Agents, 70, Chancery Lane, London, W.C.2. AGENTS WANTED. CARAMEL FOR COLOURING. Manufacturer would like to get in touch with agents or merchants who could introduce business on a large scale. Box H 801, LEE & NIGHTINGALE, Required for Fertiliser Department of London Merchants' House. FULLY EXPERIENCED SALESMAN. Must be well introduced to Buyers of BasicSlag, Superphosphate, etc. Competent in all branches of Home and Export Trade. Write, stating age, full particulars of previous employment, and salary required, to Box G. 663, Willings, 119, Moorgate, E.C.2. Publisher's Announcements. The following Books can be obtained from Rea and Inchbould, Merton House, Salisbury Square, London, E.C.4. By post, 5/- net. 300 QUESTIONS AND ANSWERS ON LATIN GRAMMAR AND COMPOSITION. By J. E. Roscoe, M.A. CONFESSIONS OF GREAT SOULS. thought on some of the world's greatest The work is handsomely bound, and has a copious index for easy reference, and the work, containing as it does, the gems of (Author of Dictionary of Educationists, Confessions of Great Souls, History of Theological Education, etc., etc.) An indispensable Book for the Student or anyone desirous of rapidly and easily acquiring a knowledge of the Latin Language. 100 pp. Post Free, 4/8. NOW GETTING VERY SCARCE. BACK NUMBERS AND VOLUMES. E have FOR SALE a limited number of the EARLIER VOLUMES and NUMBERS of the CHEMICAL NEWS and are prepared to supply orders at the following rates, CARRIAGE EXTRA, (subject to the Volumes or Numbers being in stock at the date when the order is received) : Various numbers, parts of Vols. 117 and 118 (1918/19) are only on sale at 3s.each. 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