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A lantern slide produced by Clement Lindley Wragge (b.1852, d.1922), likely dating between 1890-1922. The slide shows text on plate relating to the discovery of Lead/'Radium G' as a result of the disintegration of 'Radium F'. Shared by Auckland War Memorial Museum, Tāmaki Paenga Hira, as part of the Clement Lindley Wragge collection. 235999|PH-1984-1-LS78-3-124|92. No known copyright restrictions. https://www.aucklandmuseum.com/discover/collections/record/1033217