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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Wedgwood scale ： ウィキペディア英語版 Wedgwood scale The Wedgwood scale is an obsolete temperature scale, which was used to measure temperatures above the boiling point of mercury of . The scale and associated measurement technique were proposed by the English potter Josiah Wedgwood in the 18th century. The measurement was based on the shrinking of clay when heated above red heat, and the shrinking was evaluated by comparing heated and unheated clay cylinders. The scale started at being 0° Wedgwood and had 240 steps of . Both the origin and the step were later found inaccurate. ==History== The boiling point of mercury limits the mercury-in-glass thermometer to temperatures below 356 °C, which is too low for many industrial applications such as pottery, glass making and metallurgy. To solve this problem, the English potter Josiah Wedgwood proposed, in the 18th century, a method to measure temperatures in his kilns. His method and temperature scale were then widely adopted in science and technical applications. They were abandoned after the invention of accurate types of pyrometer, for example the pyrometer of John Frederic Daniell in 1830. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Wedgwood scale」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.