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The 1940s (pronounced "nineteen-forties" and commonly abbreviated as "the '40s" or "the Forties") was a decade that began on January 1, 1940, and ended on December 31, 1949. Most of World War II took place in the first half of the decade, which had a profound effect on most countries and people in Europe , Asia , and elsewhere.
This invention was only primarily used with steam locomotives that had booster valves or superchargers to heat the fire even hotter to produce extra power. The coal used was semi-bituminous and bituminous coal only inside the steam locomotives. Sadly, this invention lasted until 1960 when Diesel's fully replaced American railroads. 1943 Slinky
The following articles cover the timeline of United States inventions: Timeline of United States inventions (before 1890) , before the turn of the century Timeline of United States inventions (1890–1945) , before World War II
In May 1981, William A. Brastad was awarded a patent for a product he invented three years earlier. His invention, the microwave popcorn bag, incorporated kernels, butter, and spices in a folded ...
Before 40 BC: Trip hammer in China [282] 38 BC: An empty shell Glyph for zero, is found on a Maya numerals Stela, from Chiapa de Corzo, Chiapas. Independently invented by Claudius Ptolemy, in the second century CE Egypt, and appearing in the calculations of the Almagest. 37 BC – 14 BC: Glass blowing developed in Jerusalem. [283] [284] [285]
August 24 – Howard Florey and a team including Ernst Chain, Arthur Duncan Gardner, Norman Heatley, M. Jennings, J. Orr-Ewing and G. Sanders at the Sir William Dunn School of Pathology, University of Oxford, publish their laboratory results showing the in vivo bactericidal action of penicillin.
Someone asked “What inventions are worse than 30 years ago?” and netizens shared their examples. The post 40 Once Great Inventions That Are Becoming Worse And Worse first appeared on Bored Panda.
His invention of the triode is almost simultaneously created by the American Lee de Forest. Max Dieckmann and Gustav Glage use the Braun tube for playback of 20-line black-and-white images. The first jukebox with records comes on the market.