Detrital quartz grains were introduced into a tube under conditions of differing average fluid velocity in order to note quantitatively as well as qualitatively the importance of particle attributes affecting rate of transportation. Difference in rate of transport due to sphericity, roundness, and size were measured and compared by use of arithmetic mean and standard deviation. Results indicate that rate of transportation is influenced by the local turbulence created by individual grains. However, rate of transport of small grains, where local turbulence is minor, is more dependent upon the ability of the particle to roll. The effect of sphericity on rate of transport is complex and is dependent upon rate of fluid flow and degree of sphericity.

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