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Descriptive Leaflet on application to THE WEST LONDON SCIENTIFIC APPARATUS CO., Premier Place, Putney, S. W. £3 10 0 Fitted with temperature compensation device, for observing quick variations of R.M.S. voltage. Can be used between o'i and 10,000 volts. Just Published. 8vo. 5s. 6d. net. AYRTON-PERRY-DUDDELL TWISTED STRIP AMMETER. THEORIES OF CHEMISTRY: small. PROCEEDINGS OF THE Full Particulars of above and other Duddell Instruments sent free on demand. The Cambridge Scientific Instrument Co., Ltd., FOURTH INTERNATIONAL CAMBRIDGE, ENGLAND. ORNITHOLOGICAL LONDON, JUNE 1905. EDITED UNDER THE DIRECTION OF THE PRESIDENT: Only 500 copies printed, 250 of which are for sale; to secure copies, orders should be sent at once to DULAU & CO., 37 Soho Square, London, W. ADVANTAGES: Very robust, and can BY THE SAME AUTHOR. Easily set up, requires A TEXT-BOOK OF ELECTRO-CHEMISTRY. no levelling. Indepen- Being Lectures delivered at the University of California, in Berkeley. BY SVANTE ARRHENIUS, DIRECTOR OF THE NOBEL INSTITUTE, STOCKHOLM. T. SLATER PRICE, D.Sc., Ph.D., F.I.C. Translated from the German Edition by JOHN MCCRAE, Ph.D. LONCMANS, CREEN & CO., 39 Paternoster Row, London, E.C. THE MICROSCOPE AND HOW TO USE IT. A Handbook for Beginners, revised and enlarged, with Chapter on ROBERT SUTTON, Publisher, 43 THE ENCHANGE, S.E. RICHARD CLAY AND SONS, LTD., BREAD STREET HILL, E.C., AND BUNGAY, SUFFOLK. |