Dynamite is an explosive made of nitroglycerin, sorbents (such as powdered shells or clay) and stabilizers. It was invented by the Swedish chemist and engineer Alfred Nobel in Geesthacht, Northern Germany and patented in 1867. It rapidly gained wide-scale use as a more powerful alternative to black powder.
invented by Fyodor Pirotsky
A tram (also known as a streetcar or trolley in North America) is a train that…
invented by Joseph Henry
A relay is an electrically operated switch. It consists of a set of input…
invented by William Reid Clanny
A safety lamp is any of several types of lamp that provides illumination in…
invented by Patrick Bell
A reaper is a farm implement or person that reaps (cuts and often also gathers)…
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