The first reported experiments were done in the late 18th century, but it really took off in the mid 19th century with people like the famous Joule who did the ground work experiments for the discovery of the first law.

• 最早发表的报告是在18世纪末期，不过真正的起飞是在19世纪中叶，由焦耳等著名人物为第一定律的发现做了奠基性的实验工作。