Originally published in 1947, this book was written to provide a student's guide to physical chemistry. It incorporates introductory material on the subject, together with more detailed information appropriate to a degree-level qualification. The basic principles of physical chemistry, as it was understood at the time of publication, are applied to a number of simple problems arranged in a logical order. Appendices are included and textual notes are incorporated throughout. This book will be of value to anyone with an interest in physical chemistry, education and the history of science.