0018933 se TABLE Particle Classification and Size Measurements Sample No. of Particles Measured Mean Size, Microns Particle Type, % Irregular Aggre gates Spheres Massive Ll 115 155 67.3 18.5 14,1 Massive L4 216 65 51.4 16,2 32.4 502 Coarse 255 48 82.0 11,0 7.0 502 Fine 287 19 93.7 3.5 2.8 500 Coarse 331 46 63.7 2.3 29.0 977 Coarse 500 Fine 264 619 47 24 94.0 3.1 9.5 14,4 977 Fine 299 21 94.6 2.3 3,1 76,1 2.9 ean BRUNO We - 118 /18