The collection consists of laboratory log-books, manuscripts, and reports of investigations: flow of water; pipe and nozzle tests; velocity distribution; hydraulic jump; bed load; ram and water hammer; and pump tests (1938-1950). Collection also includes 120 machinery trade company catalogs (valves, water wheels, drills, culverts and gates, turbines, pumps, pile driving machinery, and wooden and metal pipes), 1910-1950.