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Recent Mathematical Stamps: 2003−2004

2009; Springer Science+Business Media; Volume: 32; Issue: 2 Linguagem: Inglês

10.1007/s00283-009-9119-x

1866-7414

Robin Wilson,

History and Theory of Mathematics

The Great Trigonometrical SurveyThis survey, extending from the southernmost tip of India to the foot of the Himalayas, was a major undertaking throughout much of the nineteenth century.Of great scientific value, it produced accurate measurements of the size of the Earth, the curvature of the Earth's surface, and the height of Mount Everest. Jantar MantarJantar Mantar ('calculation instrument') is an observatory in Jaipur, built around 1730 by the Maharajah Jai Singh II.Consisting of 14 massive geometrical instruments for measuring astronomical data, it includes the 90-foot Samrat Yantra, the world's largest sundial.There are also Jantar Mantars in Delhi and other Indian cities.