Barometer in which the scale markings are adjusted to take account of the changes of the mercury level in the cistern, so eliminating the need for adjustment of the cistern to the fiducial point as is required in the Fortin barometer.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。