Fun fact: The author Silvanus Thompson was an early pioneer of what is now known as transcranial magnetic stimulation. You can see him posing with his head in a

Fun fact: The author Silvanus Thompson was an early pioneer of what is now known as transcranial magnetic stimulation. You can see him posing with his head in a device for testing neurophysiological effects of alternating magnetic fields in figure 4 of this paper: http://rsnr.royalsocietypublishing.org/content/61/1/5.figures-only http://rsnr.royalsocietypublishing.org/content/61/1/5.figure...