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An electroscope can only give a rough indication of the quantity of charge; an instrument that measures electric charge quantitatively is called an electrometer. The electroscope was the first electrical measuring instrument. The first electroscope was a pivoted needle (called the versorium), invented by British physician William Gilbert around ...
The versorium (Latin word for "turn around") was the first electroscope, the first instrument that could detect the presence of static electric charge. [1] It was invented in 1600 by William Gilbert, physician to Queen Elizabeth I.
Abraham Bennet FRS (baptised 20 December 1749 – buried 9 May 1799) was an English clergyman and physicist, the inventor of the gold-leaf electroscope and developer of an improved magnetometer. Alessandro Volta cited Bennet as a key influence on his work, although Bennet's own work was curtailed by the political turbulence of his time. [1]
He invented the first electrical measuring instrument, the electroscope, in the form of a pivoted needle he called the versorium. [10] Like other people of his day, he believed that crystal (clear quartz) was an especially hard form of water, formed from compressed ice:
In 1748, Nollet invented one of the first electrometers, the electroscope, which showed electric charge using electrostatic attraction and repulsion. Nollet is reputed to be the first to apply the name "Leyden jar" to the first device for storing electricity.
In the same year, he also invented an electroscope. [14] In 1750 Nollet was the first to report a phenomenon that is known today as electrostatic spraying. [15] He noted that water flowing from a vessel would aerosolize if the vessel was electrified and placed near electrical ground.
Headline from the New York Times article on Szczepanik's telectroscope (April 3, 1898). Nevertheless, the word "telectroscope" was widely accepted. It was used to describe the work of nineteenth century inventors and scientists such as Constantin Senlecq, [6] George R. Carey, [7] Adriano de Paiva, and later Jan Szczepanik, who with Ludwig Kleiberg obtained a British patent (patent nr. 5031) [8 ...
This type of electroscope usually acts as an indicator and not a measuring device, although it can be calibrated. A calibrated electrometer with a more robust aluminium indicator was invented by Ferdinand Braun and first described in 1887.