The diagnostic claim of the Electronic Reactions of Abrams, advanced in Abrams’s 1916 New Concepts in Diagnosis and Treatment and operationalized through the Dynamizer. The 1925 Nature account describes the apparatus: a drop of the patient’s blood (or ‘sputum, saliva, or even his signature’) was placed on electrodes wired through resistance boxes to a healthy ‘subject’ standing on earthed plates ‘facing west,’ whose abdomen the operator percussed; the resistance readings at which the percussion note turned ‘dull’ were recorded as the ‘rates’ of electronic vibration, said to encode ‘sex, race, religion, as well as disease in all its varying forms.’ The claim is refuted: the Scientific American committee (1923-1924) concluded the claims ‘are not substantiated,’ and the consulting engineers found the apparatus passed only about a micro-ampere of current and could perform no such analysis. Classified mechanism_only because the asserted diagnostic signal had no physical existence to test as an endpoint.