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
Portus B. Weare (steamship) Portus B. Weare (steamship) Portus B. Weare was a wooden sternwheel steamship built in 1892 for service on the Yukon River. She played a notable role in the Klondike gold rush, being the second ship to bring news of the Klondike gold strike and an estimated $1 million in gold down the river in 1897. This set off the gold rush. The vessel carried freight and passengers up the Yukon to Dawson City and later Fairbanks. She was abandoned in 1926 or 1927, after the need for steamboat transport to the interior declined. Portus Baxter Weare (January 1, 1842 -