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
Alaska Steamship Company Alaska Steamship Company The Alaska Steamship Company was formed on August 3, 1894. While it originally set out to ship passengers and fishing products, the Alaska Steamship Company began shipping mining equipment, dog sleds, and cattle at the outbreak of the Klondike Gold Rush of 1897. The company was purchased by the Alaska Syndicate and merged with the Northwestern Steamship Company in 1909, but retained its name, and the fleet was expanded to 18 ships. During World War II, the government took over the company's ships. When the war ended, the company struggled to compete with the new Alaska Highway