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Patent 512,118 - JAN 2, 1894 - by N.B. Lichty and J.W. Kennedy.
'Phrenology' is a theory which claims to be able to determine character, personality traits, and criminality on the basis of the shape of the head (reading 'bumps'). Developed by German physician Franz Joseph Gall around 1800, it was very popular in the 19th century.