coho 0 1 OO 2 Ov O§ 3 ara_o 5 Thousands of c/m 8 10 5 L 2 al el 03 oA , 4 PotLS 3 mn . o rrr pers Log of log of tens of c/m Ww Number 10 the i o2 Figure 2. Thousands of c/m 6 Histograms showing frequency distributions of counts of radioactivity of Ingebi beach sand. Upper, counts for 100 small (6 mg) samples. Middle, logarithms of logarithms of the same counts. Lower, counts for 100 large (3000 mg) samples. - 10 - oop ARCHES fir