He said he could cure people by "balancing" their discordant frequencies and claimed that his devices are sensitive enough that he could tell someone's religion by looking at a drop of blood.[1] He developed thirteen devices and became a millionaire leasing his devices,[6][8] and the American Medical Association described him as the "dean of gadget quacks".[8] His devices were definitively proven useless by an independent investigation commissioned by Scientific American in 1924.[3] He used "frequency" not in its standard meaning, but to describe an imputed energy type, which does not correspond to any property of energy in the scientific sense.[10]