LIST OF PLATES 



Secretary's Report: Facing page 



Plates 1, 2 54 



Plates 3, 4 94 



Plates 5-8 134 



Edge of the sun (Menzel) : Plates 1-4 222 



Mystery of Mars (Wilkins): Plates 1, 2 230 



Cosmic rays (Swann) : Plates 1, 2 262 



Hurricanes (Gentry and Simpson): Plate 1 310 



Thunder-eggs and geodes (Brown) : Plates 1-6 334 



Giant ground sloths in Panama (Gazin) : Plates 1-8 342 



Kitimat story (Croome) : Plates 1-4 358 



Sewage treatment (Keefer) : Plates 1-6 374 



Pioneer settlement in eastern Colombia (Crist and Guhl) : Plates l-8_. . . . 406 



Rivers in the sea (Smith): Plates 1-6 438 



Smithsonian-Bredin Caribbean Expedition (Schmitt) : Plates 1-8 - . 454 



Project Coral Fish (Bayer and Harry-Rofen) : Plates 1-10 486 



Plates 11-20 ___. 502 



Archeological work in Arctic Canada (Collins): Plates 1-14 518 



Cherokees of North Carolina (Gilbert) : Plates 1-8 550 



