"The Mechanism of Human Speech, with a Description of a Speaking Machine" by Wolfgang von Kempelen; described as a comprehensive journal of twenty years of his research in phonetics and containing his studies of the human vocal tract and the technical aspects of the construction of his speaking machine.

Scanned copy, original not owned by OHSU; [20], 456 p., XXVI leaves of plates : ill., port.; 18 cm. (8vo)