A Comparison of Penetrating Showers in Light and Heavy Elements. I

Abstract
A comparison of the multiplicity of penetrating, particles has been made for penetrating showers originating in C and Pb, and for showers starting in Fe and paraffin. The comparison is made by observing the rates of different sized showers per mean free path of the generating material. Large differences are found in the comparison of Pb and C. The comparison of Fe and paraffin essentially gives a comparison of Fe and C as the showers originating in hydrogen were not recorded efficiently. The difference between showers starting in Fe and C is smaller than in the comparison of Pb and C.