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
Beaver (steamship) Beaver (steamship) Beaver was the first steamship to operate in the Pacific Northwest of North America. She made remote parts of the west coast of Canada accessible for maritime fur trading and was chartered by the Royal Navy for surveying the coastline of British Columbia. She served off the coast from 1836 until 1888, when she was wrecked. "Beaver" was built in Blackwall, England of British oak, elm, greenheart and teak, and was copper fastened and sheathed. Her length was , and the beam over her paddle boxes was . She was launched at Blackwall Yard on 9 May 1835