VI C0NTE2TTS 



General Appendix 



Fag« 



Twenty -five years' study of solar radiation, by C. G. Abbot 175 



The composition of the sun, by Henry Norris RusseD 199 



Sun spots and radio reception, by Harlan T. Stetson 215 



An evolving universe, by Sir James Jeans ._ 229 



The rotation of the galaxy, by A. S. Eddington ._._._ 239 



Stellar laboratories, by Theodore Dunham, jr 259 



Present status of theory and experiment as to atomic disintegration and 



atomic synthesis, by Robert A. Millikan 277 



Assault on atoms, by Arthur H. Compton 287 



Two-way television, by Herbert E. Ives 297 



Research Corporation awards to A. E. Douglass and Ernst Antevs for 



researches in chronology ._ 303 



Shaping the earth, by William Bowie 325 



The earth beneath in the light of modern seismology, by Ernest A. Hodg- 

 son 347 



Coming to grips with the earthquake problem, by N. H. Heck 361 



Grov/ing plants without soil, b}' Earl S. Johnston ._ 381 



Some aspects of the adaptation of living organisms to their environment, 



by H. S. Halcro Wardlaw 389 



The utilization of aquatic plants as aids in mosquito control, by Rob- 

 ert Matheson .. 413 



Our friends the insects, by W. V. Balduf 431 



Evolution of the insect head and the organs of feeding, by R. E. Snodgrass. 443 



The debt of agriculture to tropical America, by O. F. Cook 491 



Some wild flowers from Swiss meadows and mountains, by Casey A. Wood_ 503 



The antiquity of civilized man, by A. H. Sayce 515 



The discovery of primitive man in China, by G. Elliot Smith 531 



The culture of the Shang Dynasty, by James M. Menzies 549 



Totem poles: A recent native art of the northwest coast of America, by 



Marius Barbeau 559 



Brobdingnagian bridges, by Othmar H. Ammann 571 



Albert Abraham Michelson, by Forest R. Moulton 579 



