28 24 7 - NUMBER DISTRIBUTION 20 16 Lb 12 + ar 4 7 0 { 2 i 3 Litilit 4 5 6 TRACK DIAMETER Figure 1. 7 910 1 20 30 (MICROMETERS) Distribution of track portion of film XXX. 598 8 | sizes in the background jt 40
28 24 7 - NUMBER DISTRIBUTION 20 16 Lb 12 + ar 4 7 0 { 2 i 3 Litilit 4 5 6 TRACK DIAMETER Figure 1. 7 910 1 20 30 (MICROMETERS) Distribution of track portion of film XXX. 598 8 | sizes in the background jt 40