Turbine waterwheels. Gas, steam, and water turbines have a casing around the blades that contains and controls the working fluid. Credit for invention of the steam turbine is given both to Anglo-Irish engineer Sir Charles Parsons (1854–1931) for invention of the reaction turbine, and to Swedish engineer Gustaf de Laval (1845–1913) for invention of the impulse turbine. Modern steam turbines frequently employ both reaction and impulse in the same unit, typically varying the degree of reaction and impulse from the blade root to its periphery. The word "turbine" was coined in 1822 by the French mining engineer Claude Burdin from the
Hedwig von Wissmann (steamship) 9 February 1916 at 11h50 in the Battle for Lake Tanganyika including and . German casualties were engineer and two native stokers killed in the engine room; a warrant officer and some natives killed and a European stoker and native seaman slightly wounded when two of the ships boats were hit by shells. Twelve Europeans, including the captain Job Odebrecht, and eight natives were captured by the British. Hedwig von Wissmann (steamship) The Hedwig von Wissmann was a German steamboat on Lake Tanganyika, which became a feature in the story behind the film "The African Queen". She was sister vessel