ELECTRO-THERAPY APPARATUS : Circa 1890. This &quot;Newly invented improved magneto-electric machine for nervous diseases&quot; is &quot;Purported to relieve a variety of physical &amp; mental ailments by application of electrical current to the patient. It is an example of technical advances being misused to promote quack medicine.&quot; The box&#x27;s instructions indicates it was, among other things, used in treating &quot;Toothache, Tic-Doloreux, or Neuralgia&quot;. (Source: Picture link)