A key to the science of electrical psychology : all its secrets explained, with full and comprehensive instructions in the mode of operation and its application to disease : with some useful and highly interesting experiments : every person an operator / by a professor of the science.

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A key to the science of electrical psychology : all its secrets explained, with full and comprehensive instructions in the mode of operation and its application to disease : with some useful and highly interesting experiments : every person an operator / by a professor of the science. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)