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Top of the Mont Blanc : ウィキペディア英語版 | Top of the Mont Blanc
The top of the Mont Blanc is a museum piece on display in the Oval Room of Teylers Museum.〔The Oval Room is the display location as at 2012〕 The specimen was supposedly cut off from the highest findable piece of ice free rock at the top of Mont Blanc on 3 August 1787 during one of the first climbs of the mountain by the Swiss geologist Horace-Bénédict de Saussure.〔(Website of the Teylers Museum on the top of the Mont Blanc )〕 ==The climb== The climb was the first known to reach the top of the Mont Blanc, and included around 20 people including De Saussure, his servant and several guides and carriers. The climbing mission was a scientific expedition, during which De Saussure undertook research (among other things) on the boiling point of water at different heights. He calculated the height at each of his experiments by measuring how long it took an alcohol burner to boil an amount of water, and by these means he determined the height of the mountain to be 4775 metres. (This later turned out to be 32 metres less than the actual height of 4807 metres). For these experiments De Saussure brought specific scientific equipment, such as a barometer and thermometer. His calculated boiling temperature of water at the top of the mountain was fairly accurate, only off by 0.1 Kelvin.〔〔(Article on the climb of the Mont Blanc by Horace-Bénédict de Saussure ) L. Touret, 'In het spoor van Horace Benedicte de Saussure', in: ''Teylers Magazijn'' 4, 1984, p. 1-5 (in Dutch)〕
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