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On May 13, 1825, Leopoldo Nobili demonstrated the first astatic galvanometer, a historical instrument that measures electric current.
The first competition between radio operators took place in Philadelphia on February 22, 1910. The jury evaluated the speed and accuracy of the Morse code they transmitted.
Since there were no general rules some organizations developed their own distress signals. The first signal was CQD which was approved on January 7, 1904 by "Circular 57" of the Marconi International Marine Communication Company and it was intended for ships equipped with its radios...
On December 20, 1880 Broadway became one of the first streets in the US lit by electric light bulbs. Later it was called "Great White Way".
The first electromagnet was created by William Sturgeon who demonstrated it to the Society of Arts on May 23, 1825.
On June 4, 1896, in a tiny workshop Henry Ford put the finishing touches on his pure ethanol-powered motor. After more than two years of experimentation, Ford had completed his first experimental automobile.
Coaxial cable is a type of electrical cable consisting of an inner conductor surrounded by a concentric conducting shield, with the two separated by a dielectric (insulating material).
On March 10, 1876 Alexander Bell used the first telephone in Boston to call Thomas Watson who was in another room but out of earshot.
Clément Ader, engineer and electrical and mechanical inventor, was fascinated by the idea of mechanical flight and spent a lot of time and money to make it come true. In 1886 he built his first aircraft which was called Éole also known as Avion (French for aeroplane).
In 1820, the Danish professor of physics, Hans Christian Oersted demonstrated a simple experiment on electricity at a lecture. During the demonstration he discovered that the electric current passing through the wire affects the magnetic compass needle located under it which was the first connection found between electricity and magnetism. According to one version this happened on February 15, 1820.
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