33
/
AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
August 1, 2025
16184
1592
2

jan 1, 1898 - James Dewar liquefied hydrogen by using regenerative cooling and his invention, the vacuum flask at the Royal Institution of Great Britain in London.

Added to timeline:

2 Sep 2017
0
0
1422

Date:

jan 1, 1898
Now
~ 127 years ago