He initially studied optical illusions and the eye's electrical response to light, but his interest turned to building a machine to monitor the heart's electrical activity.

他最初研究和眼睛对的电反应，但他的兴趣转向建造一台监测心脏电活动的机器。

Electricity, magnetism, gases, optics, acoustics, kinetics, and statistical mechanics, to name just a few, all had fallen into order before them.

电、磁、、、声、动力和统计力，仅举几例，都在他们面前按顺序排列。