{"id":414,"count":4,"description":"<strong>Edmund Hartnack (1826-1891) and Adam Prazmowski (1821-1885)<\/strong>\r\n\r\n<img class=\"alignleft wp-image-1989 \" src=\"https:\/\/stichtinghistorischemicroscopie.nl\/wp-content\/uploads\/2016\/10\/Hartnack-Prazmowski_Hartnack.jpg\" alt=\"\" width=\"200\" height=\"232\" \/><img class=\"alignleft wp-image-1990 \" src=\"https:\/\/stichtinghistorischemicroscopie.nl\/wp-content\/uploads\/2016\/10\/Hartnack-Prazmowski_Prazmowski.jpg\" alt=\"\" width=\"200\" height=\"326\" \/>\r\n\r\nIn cooperation with his uncle George Oberhauser (1798 to 1868), a maker of optical instruments in Paris since 1830, Edmund Hartnack opened his business in 1857, but after 1860, Hartnack was the sole owner. Because of the Franco-Prussian War, Hartnack left Paris in 1870 and moved to Potsdam.\r\n\r\nAdam Prazmowski, a Polish physicist specialising in astrophysics, carried on the Paris workshop with the product being sold under the brand Hartnack &amp; Prazmowski. In 1878, Hartnack turned the Paris workshop over to Prazmowski, who later collaborated with B\u00e9zu &amp; Hausser. Nachet et fils took the company over in 1896. Hartnack continued his work in Potsdam, \u00a0and his work was of such a high standard that his microscopes were used by luminaries including Sigman Freud, Louis Pasteur, and Robert Koch.","link":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/hartnack-prazmowski-en\/","name":"HARTNACK &amp; PRAZMOWSKI","slug":"hartnack-prazmowski-en","taxonomy":"category","parent":0,"meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>HARTNACK &amp; PRAZMOWSKI Archieven - Stichting voor Historische Microscopie<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/hartnack-prazmowski-en\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HARTNACK &amp; PRAZMOWSKI Archieven - Stichting voor Historische Microscopie\" \/>\n<meta property=\"og:description\" content=\"Edmund Hartnack (1826-1891) and Adam Prazmowski (1821-1885) In cooperation with his uncle George Oberhauser (1798 to 1868), a maker of optical instruments in Paris since 1830, Edmund Hartnack opened his business in 1857, but after 1860, Hartnack was the sole owner. Because of the Franco-Prussian War, Hartnack left Paris in 1870 and moved to Potsdam. Adam Prazmowski, a Polish physicist specialising in astrophysics, carried on the Paris workshop with the product being sold under the brand Hartnack &amp; Prazmowski. In 1878, Hartnack turned the Paris workshop over to Prazmowski, who later collaborated with B\u00e9zu &amp; Hausser. Nachet et fils took the company over in 1896. Hartnack continued his work in Potsdam, \u00a0and his work was of such a high standard that his microscopes were used by luminaries including Sigman Freud, Louis Pasteur, and Robert Koch.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/hartnack-prazmowski-en\/\" \/>\n<meta property=\"og:site_name\" content=\"Stichting voor Historische Microscopie\" \/>\n<meta property=\"og:image\" content=\"https:\/\/stichtinghistorischemicroscopie.nl\/wp-content\/uploads\/2016\/10\/Hartnack-Prazmowski_Hartnack.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"CollectionPage\",\"@id\":\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/hartnack-prazmowski-en\/\",\"url\":\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/hartnack-prazmowski-en\/\",\"name\":\"HARTNACK &amp; PRAZMOWSKI Archieven - Stichting voor Historische Microscopie\",\"isPartOf\":{\"@id\":\"https:\/\/stichtinghistorischemicroscopie.nl\/#website\"},\"breadcrumb\":{\"@id\":\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/hartnack-prazmowski-en\/#breadcrumb\"},\"inLanguage\":\"en-US\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/hartnack-prazmowski-en\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"HARTNACK &amp; PRAZMOWSKI\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/stichtinghistorischemicroscopie.nl\/#website\",\"url\":\"https:\/\/stichtinghistorischemicroscopie.nl\/\",\"name\":\"Stichting voor Historische Microscopie\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/stichtinghistorischemicroscopie.nl\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"HARTNACK &amp; PRAZMOWSKI Archieven - Stichting voor Historische Microscopie","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/hartnack-prazmowski-en\/","og_locale":"en_US","og_type":"article","og_title":"HARTNACK &amp; PRAZMOWSKI Archieven - Stichting voor Historische Microscopie","og_description":"Edmund Hartnack (1826-1891) and Adam Prazmowski (1821-1885) In cooperation with his uncle George Oberhauser (1798 to 1868), a maker of optical instruments in Paris since 1830, Edmund Hartnack opened his business in 1857, but after 1860, Hartnack was the sole owner. Because of the Franco-Prussian War, Hartnack left Paris in 1870 and moved to Potsdam. Adam Prazmowski, a Polish physicist specialising in astrophysics, carried on the Paris workshop with the product being sold under the brand Hartnack &amp; Prazmowski. In 1878, Hartnack turned the Paris workshop over to Prazmowski, who later collaborated with B\u00e9zu &amp; Hausser. Nachet et fils took the company over in 1896. Hartnack continued his work in Potsdam, \u00a0and his work was of such a high standard that his microscopes were used by luminaries including Sigman Freud, Louis Pasteur, and Robert Koch.","og_url":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/hartnack-prazmowski-en\/","og_site_name":"Stichting voor Historische Microscopie","og_image":[{"url":"https:\/\/stichtinghistorischemicroscopie.nl\/wp-content\/uploads\/2016\/10\/Hartnack-Prazmowski_Hartnack.jpg","type":"","width":"","height":""}],"twitter_card":"summary_large_image","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"CollectionPage","@id":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/hartnack-prazmowski-en\/","url":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/hartnack-prazmowski-en\/","name":"HARTNACK &amp; PRAZMOWSKI Archieven - Stichting voor Historische Microscopie","isPartOf":{"@id":"https:\/\/stichtinghistorischemicroscopie.nl\/#website"},"breadcrumb":{"@id":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/hartnack-prazmowski-en\/#breadcrumb"},"inLanguage":"en-US"},{"@type":"BreadcrumbList","@id":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/hartnack-prazmowski-en\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/"},{"@type":"ListItem","position":2,"name":"HARTNACK &amp; PRAZMOWSKI"}]},{"@type":"WebSite","@id":"https:\/\/stichtinghistorischemicroscopie.nl\/#website","url":"https:\/\/stichtinghistorischemicroscopie.nl\/","name":"Stichting voor Historische Microscopie","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/stichtinghistorischemicroscopie.nl\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/wp-json\/wp\/v2\/categories\/414","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/wp-json\/wp\/v2\/categories"}],"about":[{"href":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/wp-json\/wp\/v2\/taxonomies\/category"}],"wp:post_type":[{"href":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/wp-json\/wp\/v2\/posts?categories=414"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}