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.

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'. This is followed by figures relating to 'the basic metabolism of human beings' and the 'mechanical work' performed by them and by 'beasts of burden'. Followed by statement on 'proportion of fuel used for warmth as compared with power', and comment on 'Hydroelectric power'. In the copy of his reply (12mo, 1 p, dated 13 March 1944) Dingle explains that he intends to 'add a footnote to the lecture' to acknowledge his indebtedness to Egerton: 'it is actually only the order of magnitude of the total figure that I shall use'.