Who conducted tests to evaluate the body's reaction to low currents on volunteers?

Charles Dalziel conducted tests to evaluate the body's reaction to low currents on volunteers. His research focused on understanding the physiological effects of electric current on humans, particularly the responses to low-voltage exposure. Dalziel's work helped establish safety standards for electrical devices by demonstrating how different levels of electrical current can affect the human body, particularly in terms of sensation and involuntary muscle reactions.

While Thomas Edison, Michael Faraday, and Nikola Tesla made significant contributions to the study of electricity and electromagnetism, their works were focused on other areas such as electrical systems, the invention of devices, and theoretical concepts rather than direct experimentation on human subjects regarding the physiological effects of electrical currents.