where dc and Ac represent the diameter and area of the smallest circumscribing circle respectively, di denotes the diameter of the largest inscribing circle. Ap is the projected area of the grain. used shadowgraphs of a grain in three mutually perpendicular positions to determine the s and roundness of gram, with and without r I the root of gram is ignored, the sphericity and roundness values were higher.found that 95% of oil bean seeds had a roundness of less than 0.55 and sphericity of less than 0.75, which explained the difficulty in getting the seeds to roll They suggested that this property should help in the design of hoppers and dehulling equipment for the seed. approximated the shape of pigeon pea as a prolate spheroid and estimated the sphericity and roundness of pigeon pea at 12.8% moisture level using 20 shadowgraphs. They reported the sphericity and roundness values of pigeon pea as 0.822 and 0.818, respectively. with a standard deviation of less than 0.056. measured the linear dimensions of grains with a micrometer(reading to 0.01 mm) and used the relation(sphericity(LWT) 011 where L m length, W width, T thickness, as proposed in Mohsenin(1981). They observed that the sphericity of soybean grain increased linearly with increasing moisture content from 8.0 to 20.0%. The sphericity and roundness values for selected grains are also included in Table 1