File:Descartes_magnetic_field.jpg
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![File:Descartes magnetic field.jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/5/5d/Descartes_magnetic_field.jpg/706px-Descartes_magnetic_field.jpg)
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摘要
描述Descartes magnetic field.jpg |
English: Drawing of a magnetic field by French philosopher René Descartes, from his Principia Philosophiae, 1644. This was one of the first drawings of the concept of a magnetic field. It shows the magnetic field of the Earth (D) attracting several round lodestones (I, K, L, M, N) and illustrates his theory of magnetism. Descartes proposed that magnetic attraction was caused by the circulation of tiny helical particles, "threaded parts" (shown), which circulated through parallel threaded pores in magnets, in through the South pole (A), out through the North pole (B), and then through the space around the magnet (G, H) back to the South pole. Oppositely threaded particles circulated in the opposite direction. When the "threaded parts" came near a lodestone or piece of iron, they passed through its pores, causing magnetic force. Alterations to image: cropped, and cloned out intruding text around edges of drawing |
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来源 | Downloaded 2009-10-09 from René Descartes (1644) Principia Philosophiae, Ludovicum, Amsterdam, p.271 on ECHO (European Cultural Heritage Online) website | |||||||||||||||||||||||
作者 |
creator QS:P170,Q9191 |
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授权 (二次使用本文件) |
Public domain - Descartes died in 1650 |
许可协议
Public domainPublic domainfalsefalse |
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本作品在其来源国以及其他著作权期限是作者逝世后100年或以下的国家和地区属于公有领域。 ![]() |
本文件已被确认为免除已知的著作权法限制(包括所有相关权利)。 |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
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当前 | 2009年10月9日 (五) 21:41 | ![]() | 1,372 × 1,165(582 KB) | Chetvorno | {{Information |Description=Drawing of the magnetic field of the Earth by René Descartes, from his ''Principia Philosophiae'', 1644. This was one of the first drawings of a magnetic field. |Source=Downloaded 2009-10-09 from [http://echo.mpi |
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