GC plus.Hamish Hamilton,1946.First US edition-later printing.Red hardback(two small nicks and dents on the edges of the cover and spine,gilt lettering to the spine) in GC plus, no Dj cover.Illustrated with b/w drawings,diagrams.Nice and clean pages with small marks and ink marks on the outer edges,small creases on the edges of the pages,small label inside the edges of the front cover.The book is in VGC for its age with light shelf wear.452pp including references and readings,index.Heavy book.