Four book reviews in the September 1999 issue of Notes and Records L.M. Principe, The aspiring adept: Robert Boyle and his alchemical quest. John Gascoigne, Science in the service of Empire: Joseph Banks, the British State and the uses of science in the Age of Revolution. Carlo Cercignani, Ludwig Boltzmann: the man who trusted atoms. E.A. Davis and I.J. Falconer, J.J. Thomson and the discovery of the electron.