A thermometer often now, and more often back in the early 1800s, consists of a glass tube up which a columnofmercury or alcohol can travel from a reservoir at the base.
现在常见的温度计由一个玻璃管和一个位于底部的贮液槽组成，贮液槽中的水银或酒精沿玻璃管上升形成液柱。
2
It is a double column, You can see, it starts with hydrogen and goes to mercury in ascending order of atomic mass.
双纵栏，你们看到，从氢开始，然后到水银，按原子质量的升序排列。
3
The air pressure is determined by the height ofmercurycolumn.