The blue cloth boards are in poor conditions - all are rubbed, Volume two and three have major, untidy loss to the spine and both have insect damage at the edges, as have volume One and Four, all involving loss. The body of the books are in excllent condition. Volume 1 - Materials And Methods; Volume 2 - Sanitary Plumbing And Drainage; Volume 3 - Water Supply; Volume 4 - Hot Water, Heating And Ventilation. Volume 5 made up of Data Sheets And Wall Charts is missing.Volume 4 however includes a consolidated index and classified key, enabling references to any subject to be readily found. All 4 volumes are profusely illustrated. No date c. 1950s. A very good set in very ugly boards. Overseas customers please note that postage will be prohibitive.