Disinformation by Proponents of Perkins’ Patent “Metallick Tractors” (1798–1806) to Sway Public Opinion in Britain in Favor of a Fraudulent Therapy

Abstract

In 1796, American physician Elisha Perkins patented “metallick Tractors” for the treatment of various ailments, particularly those associated with pain. They were subsequently rapidly and widely disseminated in the United States and Great Britain based on testimonials and deceptive marketing tactics. Dissemination was facilitated by endorsements from prominent physicians, politicians, and clergymen; quasi-theoretical, handwaving explanations of efficacy based on Galvani’s then-current experiments; and the procedure’s apparent safety and simplicity. However, blinded placebo-controlled trials in Great Britain using sham devices demonstrated that the therapy was ineffective. In response, in the period from 1798 to 1806, Perkinists unleashed a barrage of disinformation (ad hominem attacks, misleading arguments, unethical propaganda tactics, and poetic and graphic satire) to sway public opinion in favor of the fraudulent therapy and against its critics. The disinformation slowed the abandonment of “tractoration”, but higher-level scientific argumentation ultimately prevailed. The Perkinist disinformation campaign had antecedents with the Mesmerist disinformation campaign in the mid-1780s. Similar propaganda tactics are still widely employed to encourage the purchase and use of disproven or fraudulent therapies, as evidenced by propaganda from adherents of acupuncture in response to negative clinical trials and from supporters of unsafe and ineffective therapies promulgated during COVID-19.