15 July 1966
Vol 153, Issue 3733

About The Cover

Surface made of dust and resembling the portion of the luner surface photographed by Luna 9. The area shown is about 2 feet by 3 feet (0.6 meter by 0.9 meter). The material is dry, commercial Portland cement Powder. The surfsce features were formed by throwimg handfuls of powder at the surface in order to simulate the action of low-velocity ejecta from meteorite impacts in luner soil. See page 290.[Cornell University]