* * * * * =THE MANUFACTURE OF LAKE PIGMENTS FROM ARTIFICIAL COLOURS.= By FRANCIS H. JENNISON, F.I.C., F.C.S. =Sixteen Coloured Plates, showing Specimens of Eighty-nine Colours, specially prepared from the Recipes given in the Book.= 136 pp. Demy 8vo. 1900. Price 7s. 6d.; India and Colonies, 8s.; Other Countries, 8s. 6d.; strictly net. =Contents.= Chapters I., Introduction.--II., The Groups of the Artificial Colouring Matters.--III., The Nature and Manipulation of Artificial Colours.--IV., Lake-forming Bodies for Acid Colours. --V., Lake-forming Bodies' Basic Colours.--VI., Lake Bases.--VII., The Principles of Lake Formation.--VIII., Red Lakes.--IX., Orange, Yellow, Green, Blue, Violet and Black Lakes. --X., The Production of Insoluble Azo Colours in the Form of Pigments.--XI., The General Properties of Lakes Produced from Artificial Colours.--XII., Washing, Filtering and Finishing. --XIII., Matching and Testing Lake Pigments.--Index. =Press Opinions.= "It is evidently the result of prolonged research, and cannot but prove a valuable consulting work to those engaged in the industry."--_Derby Mercury._ "The practical portion of the volume is the one which will especially commend itself, as that is the part of the subject which most readers would buy the book for."--_Chemist and_ _Druggist._ "This work just issued is a very valuable treatise on the manufacture of lake pigments of the coal-tar series principally. The plan adopted by the author in writing up the subject enables the manufacture to be very readily understood.... The general properties of lakes produced from artificial colours, washing, filtering and finishing, and matching and testing lake pigments are well and exhaustively described, so that no manufacturer or user of lake pigments can well afford to be without this work."--_Chemical Trade Journal._ "This is undoubtedly a book which will occupy a very high place amongst technical works, and will prove of exceptional value to all whom it immediately concerns. We have no hesitation in recommending it as one of the best works of its class we have ever read. Mr. Jennison has set about his task with a lucid style, and with a complete mastery of his subject. .. We do not think students of the technical side of the paint and colour industry can possibly spend 7s. 6d. in a more profitable way than by buying this publication."--_Eastern_ _Morning News._ * * * * * =THE TESTING AND VALUATION OF RAW MATERIALS USED IN PAINT AND COLOUR MANUFACTURE.= By M.W. JONES, F.C.S. A Book for the Laboratories of Colour Works. 88 pp. Crown 8vo. 1900. Price 5s.; India and Colonies, 5s. 6d.; Other Countries, 6s.; strictly net. =Contents.=