VI CONTENTS 



General Appendix 



Page 



The constitution and evolution of the stars, by Henry Norris Russell— 145 



The sun and sunspots, 1820—1920, by E. Walter Maunder 159 



Joining the electric wave and heat wave spectra, by E. F. Nichols and 



J. D. Tear 175 



The possibilities of instrumental development, by George E. Hale 187 



The borderland of astronomy and geology, by Prof. A. S. Eddington ]95 



Atmospheric nitrogen fixation, by Eric A. Lof 203 



The place of proteins in the diet in the light of the newer knowledge of 



nutrition, by H. H. Mitchell 223 



The story of the production and uses of ductile tantalum, by Clar- 

 ence W. Balke . 233 



The composition of the earth's interior, by L. H. Adams and E. D. 



Williamson 241 



Diamond-bearing peridotite in Pike County, Ark., by H. D. Miser and C. 



S. Ross 261 



Recent progress and trends in vertebrate paleontology, by W. D. Matthew 273 



Animals in the National Zoological Park, by N. Hollister 291 



The burrowing rodents of California as agents in soil formation, by 



Joseph Grinnell 339 



The natural history of China, by A. deC. Sowerby 351 



Life in the ocean, by Austin H. Clark 369 



A study of the flight of sea gulls, by R. C. Miller 395 



Insect musicians and their instruments, by R. E. Snodgrass 405 



The gardens of ancient Mexico, by Zelia Nuttall 453 



The Hovenweep National Monument, by J. Walter Fewkes 465 



The origin and antiquity of the American Indian, by A. Hrdlie"ka 481 



The anthropological work of Prince Albert I of Monaco, and recent 



progress in human paleontology in France, by Marcellin Boule 495 



Ruined cities of Palestine, east and west of the Jordan, by Arthur 



W. Sutton 509 



The utilization of volcanic steam in Italy 519 



Proposed tidal hydroelectric power development of Petitcodiac and Meni- 



ramcook Rivers, by W. Rupert Turnbull 523 



Sir James Dewar, by Sir James Crichton-Browne 547 



J. C. Kapteyn, by A. Van Maanen 555 



Julius Von Hann, by G. C. Simpson 563 



