"The scientists who are using
it to-day are working, not with a view to aiding criminal
jurisprudence, but with the hope of making such discoveries that
the mental health of the race may be bettered. Still, I believe
that in the study of mental diseases these men are furnishing the
knowledge upon which future criminologists will build to make the
detection of crime an absolute certainty. Some day there will be
no jury, no detectives, no witnesses, no attorneys. The state will
merely submit all suspects to tests of scientific instruments like
these, and as these instruments can not make mistakes or tell lies
their evidence will be conclusive of guilt or innocence.
"Already the psychometer is an actual working fact. No living man
can conceal his emotions from the uncanny instrument. He may bring
the most gigantic of will-powers into play to conceal his inner
feelings and the psychometer will record the very work which he
makes this will-power do.
"The machine is based upon the fact that experiments have proved
that the human body's resistance to an electrical current is
increased with the increase of the emotions.
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