A study has been made to determine the characteristics of shock induced stress wave propagation in horizontal columns of dry sand confined under constant lateral pressure. The results of experiments in which stress-time histories were measured at several positions along the column were compared to calculated values based upon a nonlinear, inelastic theory of wave propagation. The theoretical results depend primarily upon the assumed stress-stain characteristics for the soil. The stressstrain characteristics considered in the analysis were based upon static stress-strain measurement, taking into account the effects of repeated loading. The modification of the static response by viscous effects and lateral inertia was also considered. The most difficult part of the experimental program was the accurate measurement of stress in the sand column. To accomplish this objective a development effort was undertaken as part of this research to obtain suitable gages and techniques for their use.