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The need to synchronize train schedules and the inefficiencies introduced by every city having its own local time, also led to introduction of Standard time by railway managers in 1883. Railroads began using diesel locomotives in the 1930s, and they completely replaced steam locomotives by the 1950s, which reduced costs and improved reliability.
1910 Headset. A headset is a headphone combined with a microphone. Headsets provide the equivalent functionality of a telephone handset with hands-free operation. They are used in call centers and by people in telephone-intensive jobs. The first-ever headset was invented in 1910, by a Stanford University student named Nathaniel Baldwin. [132]
From 1700 to 1774, the output of the thirteen colonies increased 12-fold, giving the colonies an economy about 30% the size of Britain's at the time of independence. [ 5 ] : x-1 Population growth was responsible for over three-quarters of the economic growth of the British American colonies.
Aerial view of the Hawthorne Works, ca. 1907. The Hawthorne Works was a large factory complex of the Western Electric Company in Cicero, Illinois.In addition to industrial plants, several on-site community amenities were provided to workers.
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