Views of Cornell University where mechanical engineer, Stanford Moss, conducted research into gas turbines as part of his doctoral thesis work in 1903. Dr. Moss later joined the staff of General Electric Company. During World War I Dr. Moss is called to Washington DC to discuss, with the National Advisory Committee on Aeronautics (NACA), development of a turbo supercharger for airplane engines. View of a biplane with turbo supercharger mounted on top of radial engine. Animated diagram illustrating workings of a turbo supercharger. Using a supercharged engine, the U.S. Army Air Services established an altitude record of 36 thousand feet. (The pilot, flying without supplemental oxygen, passes out and doesn't regain consciousness until the airplane has fallen about 30 thousand feet.)
The lumber industry in forest areas of the United States. Animated map shows the Northern Forest, Hardwood Forest, Southern Forest, Rocky Mountain Forest and the Pacific Forest. Snow covered roofs at a lumber camp in northern Michigan during the winter. Workers come out for their daily work. Horse drawn carts on a snow covered surface.
The lumber industry in forest areas of the United States. Two men fell a tree with a saw. The tree falls on the ground. Logs are drawn to a convenient place with the help of horse drawn carts. A low loading sled makes it easy to load the logs. Group of men load these logs on flatcars. A train loaded with logs departs from a station.
The lumber industry in forest areas of the United States. Wooden logs are dragged and pulled with the help of a crane. The logs are moved by an aerial cable. The logs slung from axles of large two wheeled carts. These carts are hauled by horses. Workers in Michigan use a crane to load logs onto flatcars.
The lumber industry in forest areas of the United States. Transportation of wooden logs is done through rivers. A group of workers in a boat. The logs come down with the force of water. Workers remove blocked logs at various points using long poles. The wooden logs reach a mill where they are sorted. The logs roll into water from flatcars.
The lumber industry in forest areas of the United States. Wooden logs move up on a conveyor into a saw mill. Workers on a saw carriage operate controls. The saw cuts the logs into boards. The workers pull the boards off the conveyor.
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