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[John Tyndall, physicist who discovered the Greenhouse Effect in 1859.] Photograph (Elliott & Fry

Author: 
John Tyndall (1820-1893), Anglo-Irish physicist, celebrated for his work on diamagnetism and infrared radiation, who discovered the Greenhouse Effect in 1859 [Global warming]
Publication details: 
No place or date.
£28.00

Photo, 5.5 x 9cms, good condition. According to AI: [The] image shows a portrait of John Tyndall, a prominent 19th-century Irish physicist and mountaineer, taken around 1872 by the photography studio Elliott & Fry. But it hasn't the card backup and printed description and ascription of the Elliott & Fry issue. And has nothing to indicate that it ever had that feature.

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Typed Note Signed ('A. C. Egerton') to Dingle, enclosing two pages of typed scientific calculations relating to the annual worldwide consumption of fossil fuels. With carbon copy of Dingle's typed reply.

Author: 
Sir Alfred Egerton [Sir Alfred Charles Glyn Egerton] (1886-1959), chemist [Professor Herbert Dingle (1890-1978), physicist and President of the Royal Astronomical Society, 1951-1953]
Publication details: 
Note dated 11 March 1944. Note and calculastions on letterheads of Imperial College of Science and Technology, London.
£100.00

All three items fair, on aged and creased paper. Slight rust-spotting at head of note, and short closed tear to leaf of calculations. Note (12mo, 1 p): He is enclosing 'a few figures' and hopes they are what Dingle wants. The calculations (4to, 2 pp) begin with working out of the 'Annual coal production in world' in therms. This is followed by similar figures for 'Petroleum' and 'Natural gas', giving the 'Total fuel (bar wood and peat) used per annum in the world'.

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