Set of 5 American School (Chicago) softcover illustrated technical publications: Boiler Practice, Pumps, Steam Engine Indicators, Gas and Oil Engines, and Gas Producers, printed 1920s-30, copyright Great Britain. All spines and covers are attached. Covers have notable wear including cup rings, spill marks, scuffs, and small tears. Spines have heavy wear at the ends; one spine (Gas Producers) does not include book title. Pages have some notations inside the front covers and some pages have color bleed from the maroon covers. Pages are white and illustrations are clear. See photos. Shipped with USPS Media Mail.