{"id":"kfkrw6o","internal_id":"b9b794ab-94e3-4da5-8790-d7779d906849","links":{"img_thumbnail":"https://digital.sciencehistory.org/downloads/deriv/xw875b2/thumb_large_2X?disposition=inline","html_self":"https://digital.sciencehistory.org/works/kfkrw6o"},"title":"Letter from Louise Haas to Otto Haas, February 22, 1913","additional_title":[],"format":["text"],"genre":["Personal correspondence"],"medium":[],"extent":[],"language":["German"],"provenance":"","subject":["Haas, Otto, 1872-1960","Haas, Louise"],"department":"Archives","series_arrangement":["Series II: Letters and Correspondence, 1903-1963"],"rights":"http://creativecommons.org/publicdomain/mark/1.0/","rights_holder":"","digitization_funder":"","file_creator":"Auerbach, Jahna","description":"Letter from Louise Haas to her son Otto Haas (1872-1960).\n\nOtto Haas was the co-founder of Rohm & Haas, best known for manufacturing Plexiglas (acrylic glass), as well as foundational chemical ingredients used in latex paints, electronic devices, building materials, and agricultural products.","description_html":"<p>Letter from Louise Haas to her son Otto Haas (1872-1960).</p>\n\n<p>Otto Haas was the co-founder of Rohm &amp; Haas, best known for manufacturing Plexiglas (acrylic glass), as well as foundational chemical ingredients used in latex paints, electronic devices, building materials, and agricultural products.</p>","published_at":"2026-08-12T14:55:10Z","updated_at":"2026-08-12T15:00:06Z","creator":[{"category":"addressee","value":"Haas, Otto, 1872-1960"},{"category":"author","value":"Haas, Louise"}],"date_of_work":[{"start":"1913-02-22","start_qualifier":"","finish":"","finish_qualifier":"","note":"","formatted":"1913-Feb-22"}],"place":[{"category":"place_of_creation","value":"Germany"}],"inscription":[],"related_link":[],"additional_credit":[],"physical_container":{"box":"2","folder":"7","volume":"","part":"","page":"","shelfmark":"","reel":"","formatted":"Box 2, Folder 7"}}