iv THE ANALYSTHEFFER’S BOOKSHOPfor TECHNXCAL & GENERAL BOOKSWe have a department specialising in the supply of scientific andtechnical books, new and secondhand, English and foreign.Classified Catalogues and Lists of new books are issued asfrequently as the paper control regulations allow, and are sent free.Our Bookshop covers every department of literature, the Sciencesand the A r t s , and enquiries for new and secondhand books willbe dealt with both intelligently and promptly.If you have any good books you would like to sell, especiallycomplete sets or long nm of scientific journals, pIease sendparticulars, however small or large the quantity.Particularly w a n t e d : - A ~ m ~ ~ ~ , Vols. 1 to 9, 14, 15, 19, 25,31,44, 49, also complete sets and long runs.W.HEFFER & SONS LTDCAMBRIDGE “ ENGLAND-THE SOCIETY OF PUBLIC ANALYSTSAND OTHER ANALYTICAL CHEMISTS.FOUNDED 1874. INCORPORATED 1907.THE objects of the Society are-to cultivate the study of analytical chemistryby holding periodical meetings, and by the publication of a journal devotedmainly to analytical chemistry ; to study questions relating to the adulterationof articles of food, drugs, and commercial products generally, and its detection;and to promote the efficiency and proper administration of the laws relating tothe repression of adulteration.Every candidate €or membership of the Society shall be not less than twenty-one years of age and shall be or have been engaged in analytical, consulting orprofessional chemistry. Each candidate for election shall be proposed by threemembers of the Society who shall provide written testimony of their persona1knowledge as to his scientific and professional fitness.If the council in theirdiscretion think fit such testimony may be dispensed with in the case of a candidatenot residing in the United Kingdom. Every application shall be placed beforethe council and the council shall have the power in their absolute discretiont o suspend or reject any application. Entrance Fee, L1 Is. AnnualSubscription, E l 1s.The Meetings are held in the Rooms of the Chemical Society, BurlingtonHouse, Piccadilly, London, W.1.“THE ANALYST,” the oEcial organ of the Society, is issued monthly tomembers, and contains reports of the proceedings of the Society, the papers readat its meetings, abstracts from other journals, information as to analytical methods,Government reports, notes on legal cases, and reviews of books.Forms of application for membership may be obtained from the Secretary,718, Idol Lane, London, E.C.3