Letter from Thomas Gold to Dr John Harris, Johnson Space Center, Houston, Texas Is sending preprints of two papers submitted to the Proceedings of the 7th Lunar Science Conference, and a paper submitted for publication in J.G.R. which represent their major laboratory work in recent times. He would draw his attention especially to the last section of the 'Electrical Properties' paper, which seems to be in the most direct conflict with the discussion that is the most widespread in the lunar program. 29 April 1976