172 pp. Contents clean with rough cut page edges, sticker of a previous owner in ffep and some foxing to front and back paste in. Red cloth binding in very good condition some bumping to the spine and bowing to the cover. Contains a small booklet breifly detailing the set of books published by Harpers Library of living thought. Part of the \"Harper\'s Library of living thought\" set. This book details advances in physical chemistry from the late 1800s and early 1900s.