MAKE A MEME
View Large Image
| View Original: | Borda_and_Cassini_pendulum_experiment.png (585x861) | |||
| Download: | Original | Medium | Small | Thumb |
| Courtesy of: | commons.wikimedia.org | More Like This | ||
| Keywords: Borda and Cassini pendulum experiment.png Drawing of pendulum experiment to determine the length of the seconds pendulum at Paris conducted in 1792 by Jean-Charles de Borda and Jean-Dominique Cassini From their original paper They used a pendulum that consisted of a 1 1/2 inch 3 8 cm platinum ball suspended by a 12 foot 3 97 m iron wire F Q It was suspended in front of the pendulum B of a precision clock A Alterations to image moved observer O closer to wall to reduce unwieldy size of image converted to PNG Image shows aliasing artifacts crosshatching from scanning of original halftone image Downloaded 2009-01-27 from http //books google com/books id A1IqAAAAMAAJ pg RA2-PA317 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 Image credited in text to J C Borda and J D Cassini de Thury 'Experiénces pour connaitre la longuer de pendule qui bat les secondes à Paris' in Collection de Mémoires Relatifs a la Physique publiés par la Société Française de Physique Vol 4 Mémoires sur le pedule précédés d'une bibliographie Gauthier-Villars Paris 1889 Plate 2 1889 Jean-Charles de Borda and Jean-Dominique Cassini Public domain - Borda died in 1799 Cassini in 1845 PD-old Pendulums Gravimetry Jean-Charles de Borda Giovanni Cassini | ||||
