VI CONTENTS 



General Appendix 



Page 



Beyond the red in the spectrum, by H. D. Babcock 165 



Growth in our knowledge of the sun, by Charles E. St. John 177 



The modern sun cult, by J. W. Sturmer 191 



The moon and radioactivity, by V. S. Forbes 207 



Modern concepts in physics and their relation to chemistry, by Irving 



Langmuir 219 



Waves and corpuscles in modern physics, by Louis de Broglie 243 



New researches on the effect of light waves on the growth of plants, by 



F. S. Brackett and Earl S. Johnston 255 



The Autogiro: Its characteristics and accomplishments, by Harold F. 



Pitcairn 265 



Ten years' gliding and soaring in Germany, by Prof. Dr. Walter Georgii. _ 273 



The first rains and their geological significance, by Assar Hadding 285 



Weather and glaciation, by Chester A. Reeds 295 



Wild life pi'otection : An urgent problem, by Ernest P. Walker 327 



The nesting habits of Wagler's Oropendola on Barro Colorado Island, by 



Frank M. Chapman 347 



The rise of applied entomology in the United States, by L. O. Howard-. 387 



Man and insects, by L. O. Howard 395 



The use of fish poisons in South America, by Ellsworth P. Killip and 



Albert C. Smith 401 



A rare parasitic food plant of the Southwest, by Frank A. Thackery and 



M. French Gilman 409 



The mechanism of organic evolution, by Charles B. Davenport 417 



Extra chromosomes, a source of variations in the Jimson weed, by Albert 



F. Blakeslee 431 



The age of the human race in the light of geology, by Stephen Richarz-_ 451 



Elements of the culture of the circumpolar zone, by W. G. Bogoras 465 



The Tell en-Nasbeh Excavations of 1929 — a preliminary report, by 



William Frederic Bade 483 



Recent progress in the field of Old World prehistory, by George Grant 



MacCurdy 495 



Ancient seating furniture in the collections of the United States National 



Museum, by Walter Hough 511 



Aspects of aboriginal decorative art in America based on specimens in the 



United States National Museum, by Herbert W. Krieger 519 



The acclimatization of the white race in the Tropics, by Robert De C. 



Ward 557 



The eighth wonder: The Holland Vehicular Tunnel, by Carl C. Gray and 



H. F. Hagen 577 



Jesse Walter Fewkes, by John R. Swanton and F. H. H. Roberts, jr 609 



George Perkins Merrill, by Charles Schuchert 617 



