Birch, Francis

Birch, (Albert) Francis

(1903–  ) geophysicist; born in Washington, D.C. His studies of elasticity of rocks and minerals at high pressures and temperatures contributed extensively to knowledge of the composition of the earth. His proposal (1940) that the earth's innermost core is not liquid, but consists mainly of solid crystalline iron, was confirmed in 1971. Birch became emeritus professor of geology at Harvard University (1974).
The Cambridge Dictionary of American Biography, by John S. Bowman. Copyright © Cambridge University Press 1995. Reproduced with permission.
References in periodicals archive ?
ALBION (3-5-1-1): Rose; Howkins, Donnellan, C Jones; Atkinson (Wright 90), Ward, Pace, Birch, Francis (Wedderburn 85); Nabi; A Jones.
The Famous Grapes defeated Cronus 2-1, with goals from Kieran Ambrose and Louis Austin, whilst Recs Roby beat Halewood Town 4-1, thanks to goals from Anthony Hargreaves, James Birch, Francis Smith and Joe McCann.