Leter from Thomas Gold to Professor Melvin Calvin, Laboratory of Chemical Biodynamics, University of California, Berkeley, California Covering letter including some information about the 'inverse cracking experiment' which is attached. States they have a sample of 1 kg of B.O.S. dust (steel furnace from iron oxides as is commonly used by the petroleum industry as a catalyst). Discusses other catalytic agents. Asks Calvin to make an estimate of the expenses involved in doing this experiment, and any others he might wish to do, so that Gold can make sure no financial bottleneck arises. 17 October 1979