This special volume is published to mark the Centenary of the founding of the Faraday Society in 1903. It consists of 23 papers re-printed from Faraday journals-the Transactions, General Discussions and Symposia-that have been published over the past 100 years. Each article has been selected by an expert in one of the many scientific fields, bounded by chemistry, physics and biology, which the Faraday Society and its successor the RSC Faraday Division seek to promote. Each paper is accompanied .