Polygraphs
Object type: Pamphlet, Metal discs
Department: Drawings and Prints
Artist: The Polygraph Company, E. M. Goldsmith & Co.
Artist bio: Philadelphia, Pennsylvania
Artist role: Publisher
Artist nationality: American
Date: ca. 1850
Medium: Two metal polygraphs and printed instructional pamphlet
Dimensions: diameter: 4 5/8 in. (11.7 cm)
Classification: Miscellaneous
Credit line: The Elisha Whittelsey Collection, The Elisha Whittelsey Fund, 1957
Accession year: 1957