The two men, so these are the two men we're looking for, cooperated on experiments with magnesium flares as a source of artificial light in 1865.

这两个人，就是我们要找的这两个人，在 1865 年合作进行了用镁照明弹作为人造光源的实验。

Experiments with magnesium flares as a source of artificial light, there is nothing about results and nothing about their reaction, so this bit is actually just irrelevant.

用镁照明弹作为人造光源的实验，没有关于结果的内容，也没有关于他们反应的内容，所以这一点实际上只是无关紧要。