Albedo is a concept which has proved useful in the calculation of the penetration of nuclear weapons radiation through a shelter entranceway. The application of the albedo approach to describe the behavior of neutrons impinging upon various materials is the subject of this report. Values of thermal neutron albedo for lead, iron, paraffin, aluminum, carbon, and high- density concrete were measured, using the nuclear reactor of the University of California at Los Angeles. The results are in reasonable agreement with theoretical calculations. Verification of the angular dependence of neutron scattering was attempted, but with only partial success. Albedo as a function of thickness of the scattering material was measured for paraffin, carbon, and aluminum. The results essentially conform with theory. The possibility of using a simple empirical formula for albedo calculations of thermal neutron streaming through shelter ducts is apparent.