Plik:Using Kater pendulum in India.png

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Opis

OpisUsing Kater pendulum in India.png	English: Drawing of the measurement of the acceleration of gravity with an invariable pendulum at Madras, India by British astronomer John Goldingham in 1821. From his 1822 paper to the Royal Society. The pendulum swings on two knife edge pivots suspended from a bracket on the wall, in front of a precision pendulum clock set to correct time by the stars. The periods of the two pendulums are compared, using a sight to eliminate parallax error. The strength of gravity is calculated from the period of the pendulum. Alterations to image: Removed caption and frame. Image contains aliasing artifacts from scanning of original halftone image, partially removed with Gimp Fourier transform tool. Converted to 64 greyscale PNG.
Data	1822
Źródło	Downloaded 2009-01-20 from Victor F. Lenzen, Robert P. Multauf (1964) 'Paper 44: Development of gravity pendulums in the 19th century' in United States National Museum Bulletin 240: Contributions from the Museum of History and Technology, reprinted in Bulletin of the Smithsonian Institution, 1964, Smithsonian Institution Press, USA, p.317, fig.13 on Google Books. Text credited drawing to John Goldingham (1822) 'Observations for Ascertaining the Length of the Pendulum at Madras in the East Indies', Philosophical Transactions of the Royal Society, Vol. 112, p.127
Autor	John Goldingham
Licencja (Ponowne użycie tego pliku)	Public domain - Goldingham died in 1849

	Ten materiał przeszedł do domeny publicznej w kraju pochodzenia, jak również w państwach i terytoriach, gdzie prawo autorskie wygasa w ciągu 70 lat po śmierci autora. You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).
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	Data i czas	Miniatura	Wymiary	Użytkownik	Opis
aktualny	14:47, 21 sty 2009		770 × 543 (200 KB)	Chetvorno	== Summary == {{Information \|Description= {{en\|Drawing of the measurement of the acceleration of gravity with a Kater's pendulum at Madras, India by British astronomer John Goldingham in 1821. Alterations to image: Removed
	14:39, 21 sty 2009		768 × 540 (201 KB)	Chetvorno	{{Information \|Description= {{en\|Drawing of the measurement of the acceleration of gravity with a Wikipedia:Kater's pendulum at Madras, India by British astronomer John Goldingham in 1821. Alterations to image: Removed caption and frame. Downloaded

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