222 COURSES Publications Received Dimethyl Sulphoxide. D. Martin and H. G. Hauthal. 'l'ranslatxl by E. S. Halberstadt. Pp. xviii -1- 600. TVokiiig- ham: Van Nostrand Keinhold. 19';J Priic ,@o. Understanding and Optimising EPe~troa Microscope Performance, S. K. Chapman. Pp. iv + 92. Rcnconsfield, Buckinghamshire : Perkin-Elmer EM Pxblica- tions. Z D i 6 The Hydrolysis of Cations. Charles F.Baes, J r . , and Robert E. Mesmer. Pp. xxii + 489. New York, London, Sydney and Toronto: John Wiley. 1976. L18.60; $33.25. Emission Spectroscopy. Edited by Ramon M. Barnes. Pp. xii + 548. Stroudsburg, Pa. : Dowden, Hutchinson and Ross. Distributed by Halsted Press. 1976. Price A21.75; $38.85. Wilson & Wilson's Comprehensive Analyti . cal Chemistry, Volume VII. Tkermsl Methods in Analytical Chemistry.SuS - stoichiometric Analytical Methods. Edited by G. Svehla. Pp. xvi + 322. Amster- dam, Oxford and New York: Elsevier. 195:; Price Df1125; $49.95. The Physical Basis for Heterogeneous Catalysis. Edited by Edmund Drauglis and Rolmt I. Jafiee. Pvoceedimgs of the Ninth Battell.;. Col- loquium in the iwatevials Sciences, Gst-inJ, Switzevland, September 2-6, 1974. Pp. xxvi 4- 596. New York and London: Plenum. 1975. Price $54. Ion- Exchange Chromatography. Edited by Harold I;. Walton. Benclminrk Papevs in Analytical Clzemistvyll. Pp. xx -1 440. Stroudsburg, Pa. : Dowden, Hutchinson & Ross. Distributed by Halsted Pres. 1976. Price L18.65; $33.30. Printed by Heffers Printers Ltd Cambridge England