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Patent for "a Psychograph, or apparatus for indicating a person's thoughts by the agency of nervous electricity".
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Specification of Adolphus Theodore Wagner: apparatus for indicating a persons thoughts by the agency of nervous electricity
1854, Queen's Printing Office
in English
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Book Details
Edition Notes
At head of title: A.D. 1854. No. 173.
"Adolphus Theodore Wagner, of Berlin, in the Kingdom of Prussia, professor of music".

