<strong>Oflaherty, C.A., Charles, E.E., and Davidson, D.T. (1963)</strong> <em>the Iowa State Compaction Apparatus: a Small Sample Apparatus for Use in Obtaining Density and Strength Measurements of Soil and Soil-Additives.</em> Project HR-83 of the Iowa State University Board, for presentation at the Forty Second Annual Meeting of the Highway Research Board, Washington, DC.