{"id":"4c98szk","internal_id":"92bbe6a5-0bc8-487d-9dad-90d7a9f4d8c9","links":{"img_thumbnail":"https://digital.sciencehistory.org/downloads/deriv/xpdccc6/thumb_large_2X?disposition=inline","html_self":"https://digital.sciencehistory.org/works/4c98szk"},"title":"First Day Cover commemorating Percy Lavon Julian","additional_title":[],"format":["image","text"],"genre":["Postage stamps"],"medium":[],"extent":["16.5 cm W x 9 cm H"],"language":["English"],"provenance":"","subject":["Julian, Percy Lavon, 1899-1975","Commemorative postage stamps","Chemists","African American chemists","First day covers (Philately)"],"department":"Archives","series_arrangement":[],"rights":"http://rightsstatements.org/vocab/InC-RUU/1.0/","rights_holder":"","digitization_funder":"","file_creator":"Auerbach, Jahna","description":"Colorano \"Silk\" Cachet First Day of Issue cover commemorating African-American chemist Percy Lavon Julian (1899-1975), who first synthesized the drug physostigmine. Julian ingeniously figured out how to synthesize important medicinal compounds from abundant plant sources, making them more affordable to mass-produce.\n\n","description_html":"<p>Colorano \"Silk\" Cachet First Day of Issue cover commemorating African-American chemist Percy Lavon Julian (1899-1975), who first synthesized the drug physostigmine. Julian ingeniously figured out how to synthesize important medicinal compounds from abundant plant sources, making them more affordable to mass-produce.</p>","published_at":"2026-07-16T19:14:29Z","updated_at":"2026-07-16T19:14:29Z","creator":[{"category":"creator_of_work","value":"United States Postal Service"},{"category":"creator_of_work","value":"Postal Commemorative Society (U.S.)"}],"date_of_work":[{"start":"1993-01-29","start_qualifier":"","finish":"","finish_qualifier":"","note":"","formatted":"1993-Jan-29"}],"place":[{"category":"place_of_creation","value":"United States"}],"inscription":[],"related_link":[],"additional_credit":[],"physical_container":{"box":"","folder":"1","volume":"","part":"","page":"","shelfmark":"","reel":"","formatted":"Folder 1"}}