Resultado de búsqueda
Hace 1 día · 1917: The crystal oscillator is invented by Alexander M. Nicholson using a crystal of Rochelle Salt although his priority was disputed by Walter Guyton Cady. 1920s [ edit ] 1925: The Fischer–Tropsch process is developed by Franz Fischer and Hans Tropsch at the Kaiser-Wilhelm-Institut für Kohlenforschung .
Hace 5 días · In 1917–1918 the War Department drafted hundreds of thousands of blacks into the army, and draftees were paid equally regardless of race. Commissioning of African-Americans officers resumed but units remained segregated and most all-black units were led by white officers. Unlike the Army, the U.S. Navy had never been formally segregated.
Hace 1 día · From 1865 through 1917 an unprecedented stream of immigrants arrived in the United States, including 24.4 million from Europe. Most came through the port of New York City , and New York City and other large cities on the East Coast became home to large Jewish , Irish , and Italian populations, while many Germans and Central Europeans moved to the Midwest .
9 de abr. de 2024 · Scouting is taught using the Scout method, which incorporates an informal educational system that emphasizes practical activities in the outdoors. Programs exist for Scouts ranging in age from 6 to 25 (though age limits vary slightly by country), and program specifics target Scouts in a manner appropriate to their age.
Hace 2 días · Mitsubishi's automotive origins date back to 1917, when the Mitsubishi Shipbuilding Co., Ltd., introduced the Mitsubishi Model A, Japan's first series-production automobile. An entirely hand-built seven-seater sedan based on the Fiat Tipo 3, it proved expensive compared to its American and European mass-produced rivals, and was discontinued in 1921 after only 22 had been built.
Hace 2 días · A group of RIC officers in 1917. The IRA's main target throughout the conflict was the mainly Irish Catholic Royal Irish Constabulary (RIC), the British government's armed police force in Ireland, outside Dublin. Its members and barracks (especially the more isolated ones) were vulnerable, and they were a source of much-needed arms.
Hace 1 día · Russian Republic. The Russian Empire, also known as Tsarist Russia, Tsarist Empire or Imperial Russia, and sometimes simply as Russia, [e] [f] was a vast realm that spanned most of northern Eurasia from its proclamation in November 1721 until its dissolution in March 1917.