From experimental results reported in a previous paper it is eoneluded that the ratio of the number of primary particles in an extensive shower, which ate capable of producing at lcast one ionizing secondary beneath a given absorber, to the number of all ionizing particles (this ratio is ealled "transition factor") depends on the shower density. Ir follows further th• the transition factor is a power function of the total number of particles contained in the shower with ah exponent between 0 and 0,2 for thicknesses of lead absorber between 0 and 25 mm. This power function permits the determination of the average total number of partieles contained in showers registrated by the apparatus and the average distance of the shower axis from the apparatus.