Show it has been gene generally rully believed that th the c temperature increased at almost a constant rate from the earths surface toward the center but this supposition appears to be incorrect in the light of recent experiments in one mine the average rate of increase in temperature carried down to feet was one degree for each feet of descent various results have been obtained from measurements in other places no temperature variations were shown between depths of 1400 feet and 2300 feet in the kal gourlie mines in australia these and other observations are considered as indicating that the increase of temperatures with depth in the earth Is not governed by any general law |