Application of spill gaps and selection of insulation levels

Authors´ closure of a paper by H. L. Melvin and R. E. Pierce published in the June 1937 issue, pages 689–94, and presented for oral discussion at the insulation co-ordination session of the summer convention, Milwaukee, Wis., June 25, 1937. Previous discussion of this paper appeared in the October 1937 issue, pages 1290–3.