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
Cowichan (steamship) Cowichan (steamship) Cowichan was a steamship which was operated in British Columbia under the ownership of the Union Steamship Company. "Cowichan" sank in 1925 following a collision with another ship. "Cowichan" was originally launched under the name "Cariboo". "Cowichan" comes from the Halkomelem word "Q(a)w-(a)can", which means "warm mountains". This is believed to refer to hills at the head of the Cowichan River. The tribe of the First Nations called "Cowichan" lived on southeast Vancouver Island. The popular name for the ship was "The Cow". "Cowichan" was designed specifically to serve the remote logging camps of coastal British Columbia. A