单词 | koniscope |
释义 | koniscopen. An instrument for estimating the concentration of dust in the air by observing the depth of colour in a sample of the air when it is expanded into a tube with glass ends and containing moist paper to saturate it with water vapour. ΘΚΠ the world > matter > gas > air > [noun] > air in any specific place or at specific time > measurement of specific quality of air > instruments for measuring specific qualities eudiometer1777 oximeter1803 ozonometer1851 ozonoscope1872 sepometer1876 koniscope1892 formenophone1894 konimeter1918 Tyndallmeter1919 1892 J. Aitken in Proc. Royal Soc. 51 435 This new instrument we intend to call a Koniscope. In its present form this instrument consists of an air-pump and a metal tube with glass ends. 1905 Westm. Gaz. 26 Aug. 13/1 Dr. Aitken has invented a very simple instrument for this purpose, which he calls the koniscope, or dust detective. 1925 W. N. Shaw & J. S. Owens Smoke Probl. Great Cities viii. 145 Condensation of water on the dust particles is utilised in Aitken's..koniscope; a fog is produced and compared with a standard. This entry has not yet been fully updated (first published 1976; most recently modified version published online March 2018). < n.1892 |
随便看 |
|
英语词典包含1132095条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。