Research by our Flickr Commons users established that John Tyndall was professor of physics at London’s Royal Institution from 1853 to 1887. Tyndall, from Leighlinbridge, Carlow, is remembered in Cork, in the Tyndall National Institute. He left Carlow at 18 to work for the Ordnance Survey around Munster, before moving to Preston. He is noted for his explanation of why the sky is blue (Rayleigh scattering), heat absorption by CO2 in the atmosphere, and the measurement of aerosols by scattering (Tyndall effect). The photographers, Millard & Robinson, were based at 39 Sackville Street Lower (now Lower O’Connell Street), Dublin. First listed at that address in 1863 as Thomas Millard only, and from 1865 to 1887 as Millard & Robinson.

Additional information about this photograph is available on the National Library of Ireland's Flickr Commons photostream http://www.flickr.com/photos/nlireland/49779345473/

Physical description: 1 cartes-de-visite : in mylar. b&w ; 10.5 x 6.5 cm ;