In Twelfth Month, 1817 Isaac Bonsall wrote that he had received an Electrical Machine, “a valuable present,” from the Visiting Managers. The next month, the Visiting Managers recorded an inventory of the Electrical Machine’s parts in their minutes. By 1817, the use of electricity to treat insanity (and a multitude of other ailments) was an unusual, but known, option, and Bonsall and the Managers thought that the Electrical Machine could be used to treat the patients. They could have read about using medicinal electricity in books like T. Gale’s Electricity, or Ethereal Fire, Considered, which even contained case studies concerning insanity. However, the Electrical Machine was unusual enough that Bonsall and the resident physician Dr. Lukens did not figure out how to use it on patients until 1820, when an acquaintance from Philadelphia came out to Frankford to teach them how it worked (Third Month, 24, 1820).