Letter from Thomas Gold to Dr S Keith Runcorn, School of Physics, The University, Newcastle upon Tyne, NE1 7RU, England Encloses a brief statement about the possible relation of the outgassing process to plate tectonics. The main considertions are in his paper (reference given) and it is not worth repeating it all. The abstract of it may be worth including, and Gold is adding it. Thanks Runcorn for inviting him. His subjedct of outgassing is doing very well at present and he believes the British are taking serious note of it. 22 June 1979