LIST OF PLATES 



Secretary's report : Pag* 



Plates 1, 2 130 



Solar radiation (Abbot) : 



Plates 1-3 198 



Composition of the sun (Russell) : 



Plates 1-4 214 



Sun spots and radio (Stetson) : 



Plates 1, 2 228 



An evolving universe (Jeans) : 



Plates 1-5 238 



Stellar laboratories (Dunham) : 



Plate 1 276 



Assault on atoms (Compton) : 



Plates 1, 2 296 



Television (Ives) : 



Plates 1-6 302 



Tree ring chronolojiy (Douglass) : 



Plates 1-5 312 



Lake-glaelal clay chronologj^ (Antevs) : 



Plates 1, 2 324 



The earthquake problem (Heck) : 



Plates 1-8 380 



Growing plants without soil (Johnston) : 



Plates 1-4 388 



Aquatic plants and mosquito control (Matheson) : 



Plates 1-7 430 



Debt of agriculture to tropical America (Cook) : 



Plates 1-7 502 



Swiss wild flowers (Wood) : 



Plates 1-6 514 



Primitive man In China (Smith) : 



Plates 1-9 548 



Totem poles (Barbeau) : 



Plates 1-6 570 



Bridges (Ammaun) : 



Plates 1-7 578 



Mlchelson (Moulton) : 



Plate 1 ^ 579 



vn 



