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[John Tyndall, physicist who discovered the Greenhouse Effect in 1859.] Autograph Signature ('John Tyndall').

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

Firm and attractive signature for autograph hunter, centred on one side of 7.5 x 9.5 cm piece of paper. No other writing. In good condition, lightly aged and creased, with labels from mount adhering to reverse.

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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