Solar retorting of oil shale has been identified as a technically feasible process where focused solar energy can displace fossil energy in the production of liquid fuels. The predicted result is a 10 to 40% improvement in the exportable fuel (oil gas) production per ton of raw shale. The degree of improvement depends strongly on the grade of the shale. Greater improvements can be achieved with the lower grade shales where with nonsolar processes a larger fraction of the fuel content has to be used in the processing. This report presents a design of a two-step solar oil shale retort, the logic for the design, and the results from a preliminary test of the design at the White Sands Solar Furnace, New Mexico. The tests showed that the basic design had considerable promise, but more development work would be needed to optimize it.