File:Andreas Cunaeus discovering the Leyden jar.png
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Summary
DescriptionAndreas Cunaeus discovering the Leyden jar.png |
English: Artist's conception of the discovery of the Leyden jar. In 1746, Andreas Cunaeus, a pupil of Pieter von Muschenbroek in Leyden, attempts to "condense" electricity in a glass of water. The rotating glass sphere (right) is an electrostatic machine. The static electricity generated by the hands rubbing on it is transferred through the chain to the suspended metal bar, and from it via the hanging wire into the glass of water. The glass acted as a capacitor, and a large charge built up in the water, and an equal charge of the opposite polarity built up in Cunaeus' hand holding the glass. When Cunaeus reached up to pull the wire out of the water, he got a severe shock, much worse than an electrostatic machine could give, because the amount of charge stored was much larger than the terminal of an electrostatic machine could store. Cunaeus took two days to recover. Musschenbroek was also impressed by the powerful shock he received from the device, writing, "I would not take a second shock for the crown of France". Reports of the experiment were widely circulated, and scientists began to investigate the charge storage ability of these "Leyden flasks". Eventually the water was replaced by foil coatings on the inside and outside of the jar to store the charge. |
Date |
before 1886 date QS:P,+1886-00-00T00:00:00Z/7,P1326,+1886-00-00T00:00:00Z/9 |
Source | Downloaded August 12, 2013 from Augustin Privat Deschanel (1876) Elementary Treatise on Natural Philosophy, Part 3: Electricity and Magnetism, D. Appleton and Co., New York, translated and edited by J. D. Everett, p. 570, fig. 382 on Google Books |
Author | The drawing seems to be signed 'Laplante' in the lower right corner |
Licensing
Public domainPublic domainfalsefalse |
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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Annotations InfoField | This image is annotated: View the annotations at Commons |
The conductive water and Cuneus's hand supporting the jar, separated by the thin insulating glass, form a capacitor able to store charge. A large charge builds up in the water, and an opposite charge builds up in Cuneus's hand, attracted from ground.
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342,467 byte
916 pixel
1,260 pixel
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 23:28, 13 August 2013 | 1,260 × 916 (334 KB) | commons>Chetvorno | User created page with UploadWizard |
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Horizontal resolution | 28.35 dpc |
Vertical resolution | 28.35 dpc |
File change date and time | 20:55, 13 August 2013 |