2026-10-08 Royal Institution collection, rigb.org

Page: 'John Tyndall's radiant heat apparatus'. [web] https://www.rigb.org/explore-science/explore/collection/john-tyndalls-radiant-heat-apparatus (saved research/pages/rigb-apparatus.html) - Object dated 1861; "Place made: Royal Institution Basement & Alps Cabin"; glass, copper, iron, wax; W 698 mm, diameter 85 mm; on display in the Faraday Museum, lower ground floor. - RI text: "first created and joined together in 1859"; Tyndall "discovered that water vapour absorbs much more radiant heat than the gases of the atmosphere and then argued the importance of atmospheric water vapour in moderating the Earth's climate". (Owner institution's characterization.) Bearing: claim 1-2 apparatus survives and could be examined. 698 mm is shorter than the 4-ft (1.22 m) tube of 1859; which experiments used this tube is not stated. Also from Google results (not visited): RI archive references RI MS JT/2/13/1158 (Tyndall Journal, 18 May 1859), RI MS JT/2/32 (Hirst diary), RI MS JT/1 (letters). The RI archive catalogue itself was not reached.