Scranton, PA: International Texbook Co., 1931, 1938. First edition. Original Cloth. 12 mo. pp 104. numerous diagrams and engravings. As with all the international textbook technical series for building tradesmen, solid, trustworthy, and practical studies, wonderfully illustrated. a scarce series. Very Good. Item #1055
A fascinating pairing, from legalistic/administrative to design issues in heating systems.