{"id":621226,"date":"2026-01-18T20:45:31","date_gmt":"2026-01-18T19:45:31","guid":{"rendered":"https:\/\/cronologia-universale.it\/august-18-1868\/"},"modified":"2026-01-18T20:45:31","modified_gmt":"2026-01-18T19:45:31","slug":"june-1862","status":"publish","type":"post","link":"https:\/\/cronologia-universale.it\/en\/june-1862\/","title":{"rendered":"June 1862"},"content":{"rendered":"<p>South Kensington, UK. International Exhibition. Thallium makes its first public appearance. It had been discovered the previous year by William Crookes, through the observation of the bright green line in its spectrum. But Claude-Auguste Lamy also arrives in South Kensington with a 14-gram ingot of thallium, declaring that what Crookes had discovered was nothing more than an impure sulfide. Lamy had extracted the thallium from the residue lining the lead chambers of a sulfuric acid production plant.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>South Kensington, UK. International Exhibition. Thallium makes its first public appearance. It had been discovered&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[36],"tags":[],"class_list":["post-621226","post","type-post","status-publish","format-standard","hentry","category-fc-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>June 1862 - Cronologia Universale<\/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:\/\/cronologia-universale.it\/en\/june-1862\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"June 1862 - Cronologia Universale\" \/>\n<meta property=\"og:description\" content=\"South Kensington, UK. 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