9ST Table 1— DISTRIBUTION OF MASS AND GROSS GAMMA ACTIVITY AMONG THE PARTICLE FRACTIONS sample 1 2 3 4 3 Distance Time fallen, * removed,f Weight, cm min mg 31.7 31.7 31.7 31.7 31.7 16.5 31.5 46.9 61.2 91.5 13.46 Cumulative weight, mg 13.46 weight fraction, mg 0.208 10.98 8.57 3.23 6.73 24.44 33.01 38.24 44,97 0.378 0.510 0.591 0.695 i qT Cumulative Gamma Cumulative activity, fraction, counts/min counts/min counts/min 1736 0.196 activity, 1736 1386 1105 763 888 3122 4227 4990 3878 activity 0.353 0.478 0.565 0.665 6 31.7 125 3.23 50.20 0.776 804 6682 0.756 7 31.7 191 4,48 54.68 0.846 710 7392 0.837 9 10 31.7 31.7 310 436 0.81 1.51 07.40 08.91 0.888 0.911 174 2909 7890 8149 0.893 0.922 11 12 13 14 31.7 15.2 4.8 <4.8 1339 1339 1344 1349 2,21 1.50 1.08 0.97 0.945 0.968 0.985 1.000 367 149 95 75 8516 8665 8760 8835 8 31.7 252 1.91 56.59 61.12 62.62 63.70 64.67 0.875 324 7716 0.873 0.964 0.981 0.992 1.000 *Particles introduced onto 30.7-cm column of x-butyl alcohol in a 2-cm layer of isobutyl alcohol. Range for distance traveled is 30.7 to 32.7 cm. The values in this column correspond to the midpoint of the range. TtSedimentation-rate calculations should include the column-temperature gradient: base, 4.5°C; 8 cm, 5.6°C; 16 cm, 11°C; and 32 cm, 20°C. NHV™X GNV LAdH Particle Cumulative