Ida Freund (1863–1914) was a chemist and educationalist most commonly remembered as the first female chemistry lecturer in Britain. Originally published in 1904, this book presents an account by Freund of the study of chemical composition. The text shows how empirical knowledge comprising the doctrine of chemical composition was developed, with information on methodology and historical development. Illustrative figures, quotations and detailed footnotes are incorporated throughout. This book will be of value to anyone with an interest in chemistry and the history of science.