Large sunspots / Seth B. Nicholson -- Atomic energy / A.E. Johns -- Telegraphy--pony express to beam radio / George C. Hillis -- Plutonium and other transuranium elements / Glenn T. Seaborg -- Use of isotopes as tracers / A.H.W. Aten and F.A. Heyn -- Silicones--a new continent in the world of chemistry / S.L. Bass -- New products of the petroleum industry / Hugh W. Field -- Tsunami of April 1, 1946, in the Hawaiian Islands / G.A. Macdonald, F.P. Shepard and D.C. Cox -- Drowned and ancient islands of the Pacific basin / H.H. Hess -- Biology of Bikini Atoll, with special reference to the fishes / Leonard P. Schultz -- Senses of bats / Brian Vesey-FitzGerald -- Mollusks and medicine in World War II / R. Tucker Abbott -- Some remarks on the influence of insects on human welfare / Carl D. Duncan -- Mosquito control tests from the Arctic to the Tropics / H.H. Stage -- Primary centers of civilization / John R. Swanton -- Ryukyu people: a cultural appraisal / Marshall T. Newman and Ransom L. Eng -- Puzzle in Panama / Waldo G. Bowman -- Comparison of propeller and reaction-propelled airplane performances / Benson Hamlin and F. Spenceley

1. Smithsonian Institution
2. Science