The objectives of this research were (1) to draw the washability curves of Missouri coal seams to determine their washability characteristics, (2) to investigate the possibility of ash and sulfur removal by gravity methods, and (3) to determine the flotation behavior of the seams. During a 2-year period 47 channel and 29 drill-hole samples were received and tested. The samples showed that Missouri coal seams contain high ash and sulfur in the as-received condition. The ash contents of 76 samples tested ranged from 8.30 to 39 percent, whereas the sulfur contents ranged from 0.95 to 14.55 percent. However, the washability tests conducted on - -1.00- to --0.25- in channel samples and --0.25-In core samples indicated that 1.40 and 1.50 Specific gravity separations, clean coals containing fairly low ash and a total sulfur percentage ranging between 1.02 and 4.69 Can be obtained.