title: [Dr. Manuel Ferreyra and his devices].
abstract: Two digitally reprocessed pictures are analyzed in order to distinguish the devices used by this professional in his daily practice as well as his experiments.
authors.forename: R A
authors.initials: RA
authors.lastname: Ponticelli
mesh_terms: D001118:Argentina; D018865:Dental Research / Q000266:history*; D004560:Electricity / Q000266:history*; D004864:Equipment and Supplies / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century
vernacular_title: El Dr. Manuel Ferreyra y sus aparatos.