{"id":435,"count":3,"description":"<strong>Wilhelm Seibert (1840-1925) and Heinrich Seibert (1842-1907)<\/strong>\r\n\r\n<img class=\"alignleft wp-image-1996 \" src=\"https:\/\/stichtinghistorischemicroscopie.nl\/wp-content\/uploads\/2016\/10\/Seibert.jpg\" alt=\"\" width=\"299\" height=\"200\" \/>\r\n\r\nWilhelm and Heinrich Seibert both worked for Carl Kellner, the German mechanic and self-taught mathematician who founded the company that was to become Leitz in 1849. When Kellner died and the company was taken over by Belthle and Rexroth, both brothers went to work for Ernst Gundlach. After a couple of business failures, Gundlach emigrated to the United States of America in 1872 and the Seibert brothers took over his loss-making German company with the help of Georg Krafft. Between 1871-1884, the company was known as Seibert and Krafft, and from 1884-1925 as W. &amp; H. Seibert.\r\n\r\nThe Seibert microscopes have been\u00a0used by famous microbiologists including Robert Koch.","link":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/seibert-en\/","name":"SEIBERT","slug":"seibert-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>SEIBERT 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\/seibert-en\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SEIBERT Archieven - Stichting voor Historische Microscopie\" \/>\n<meta property=\"og:description\" content=\"Wilhelm Seibert (1840-1925) and Heinrich Seibert (1842-1907) Wilhelm and Heinrich Seibert both worked for Carl Kellner, the German mechanic and self-taught mathematician who founded the company that was to become Leitz in 1849. When Kellner died and the company was taken over by Belthle and Rexroth, both brothers went to work for Ernst Gundlach. After a couple of business failures, Gundlach emigrated to the United States of America in 1872 and the Seibert brothers took over his loss-making German company with the help of Georg Krafft. Between 1871-1884, the company was known as Seibert and Krafft, and from 1884-1925 as W. &amp; H. Seibert. The Seibert microscopes have been\u00a0used by famous microbiologists including Robert Koch.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/seibert-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\/Seibert.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\/seibert-en\/\",\"url\":\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/seibert-en\/\",\"name\":\"SEIBERT Archieven - Stichting voor Historische Microscopie\",\"isPartOf\":{\"@id\":\"https:\/\/stichtinghistorischemicroscopie.nl\/#website\"},\"breadcrumb\":{\"@id\":\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/seibert-en\/#breadcrumb\"},\"inLanguage\":\"en-US\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/seibert-en\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/stichtinghistorischemicroscopie.nl\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"SEIBERT\"}]},{\"@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":"SEIBERT 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\/seibert-en\/","og_locale":"en_US","og_type":"article","og_title":"SEIBERT Archieven - Stichting voor Historische Microscopie","og_description":"Wilhelm Seibert (1840-1925) and Heinrich Seibert (1842-1907) Wilhelm and Heinrich Seibert both worked for Carl Kellner, the German mechanic and self-taught mathematician who founded the company that was to become Leitz in 1849. When Kellner died and the company was taken over by Belthle and Rexroth, both brothers went to work for Ernst Gundlach. After a couple of business failures, Gundlach emigrated to the United States of America in 1872 and the Seibert brothers took over his loss-making German company with the help of Georg Krafft. Between 1871-1884, the company was known as Seibert and Krafft, and from 1884-1925 as W. &amp; H. Seibert. The Seibert microscopes have been\u00a0used by famous microbiologists including Robert Koch.","og_url":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/seibert-en\/","og_site_name":"Stichting voor Historische Microscopie","og_image":[{"url":"https:\/\/stichtinghistorischemicroscopie.nl\/wp-content\/uploads\/2016\/10\/Seibert.jpg","type":"","width":"","height":""}],"twitter_card":"summary_large_image","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"CollectionPage","@id":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/seibert-en\/","url":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/seibert-en\/","name":"SEIBERT Archieven - Stichting voor Historische Microscopie","isPartOf":{"@id":"https:\/\/stichtinghistorischemicroscopie.nl\/#website"},"breadcrumb":{"@id":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/seibert-en\/#breadcrumb"},"inLanguage":"en-US"},{"@type":"BreadcrumbList","@id":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/category\/seibert-en\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/stichtinghistorischemicroscopie.nl\/en\/"},{"@type":"ListItem","position":2,"name":"SEIBERT"}]},{"@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\/435","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=435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}