BOOK REVIEWS 765 feature is the full or partial reproduction of original papers that had introduced some novel analytical technique these references are supported by a text explaining its development, and placing the topic in its contemporary setting. Analysts frequently complain of difficulty in keeping abreast of modern trends: those already using, or contemplating the use of, electroanalytical procedures will find this little book an adequate introduction to the principles and applications of coulometry. At the outset Dr. Milner and his co-author (no connection with your reviewer) explain and exemplify the use of constant-current and fixed-potential coulometry. The simple accounts of various methods of determination of current passed, and of the detection of end-points, are readily comprehended. An adequate outline is pro- vided for the design and modification of electrolysis cells and the construction of appropriate measuring and controlling circuits for both systems of coulometry. The first part of the monograph, in fact, emphasises the practical, 'do-it-yourself', approach for analysts capable of 'knocking together' their own circuitry. In the next two chapters there are lengthy tabulations of published applications of the two techniques to inorganic and organic analysis more than 150 references are cited. In the final chapter the authors place coulometry in its historical perspective by means of their selection of a logical series of translations or reprints of, or relevant extracts from, nine fundamental papers that establish the state of the art. These appropriately begin with the declaration (in 1938) of basic principles by Szebelledy and Somogyi---who may be said to have fathered coulometry as a precision analytical tool all subsequent work is a refinement of their innovation. G.F. PHILLIPS.

Society of Cosmetic Great Britain Chemists of 1968-69 PROGRAMME Lectures will be delivered on the following Thursdays: Venue: The Royal Society of Arts, John Adam Street, London, W.C.2. Time: 7.30 p.m. 31st October 1968 Legislation and the testing of cosmetics Dr. J. Ward Reagan (Huntingdon Research Centre, Huntingdon). 5th December 1968 Photography as an aid to industry R. Bennett (Royal Aircraft Establishment, Farnborough). 9th January 1969 Fluoride dentifrices Dr. M. N. Naylor (Guy's Hospital, London). 6th February 1969 Joint Meeting with British Society of Perfumers 6th March 1969 Surface active agents Dr. Aalbers (Chemy, N.V., Bodegraven, Netherlands) 11 th April 1969 Organ culture of skin Dr. I. Sarkany (Royal Free Hospital, London, W.C.1.). MEDAL LECTURE: Thursday, 1st May 1969 An industrialist looks at the cosmetics industry Leonard P. Matchan (Chairman, Cope Allman Group). 1969 DINNER AND DANCE: Friday, 14th February, at the Russell Hotel, Russell Square, London, W.C.2. ANNUAL GENERAL MEETING: Wednesday, 21st May 1969. 767