REPORT OF THE SECRETARY 1X5 



The appendix contained the following papers : 



Weather governed by changes in the sun's radiation, by C. G. Abbot. 



Seasonal weather and its prediction, by Sir Gilbert T. Walker. 



The sun's place among the stars, by Walter S. Adams. 



The atmospheres of the planets, by Henry Norris Russell. 



The surface features of the moon, by F. E. Wright. 



The upper atmosphere, by G. M. B. Dobson, D. Sc, F. R. S. 



The nature of the cosmic radiation, by Thomas H. Johnson. 



What is electricity? by Paul R. Heyl. 



New facts about the nucleus of the atom, by Carl D. Anderson. 



The approach to the absolute zero of temperature, by F. Simon, D. Phil. 



Discovery and significance of vitamins, by Sir Frederick Gowland Hopkins, 

 P. R. S. 



The salinity of irrigation water, by Carl S. Scofield. 



Selenium absorption by plants and their resulting toxicity to animals, by 

 Annie M. Hurd-Karrer. 



The glacial history of an extinct volcano. Crater Lake National Park, by 

 Wallace W. Atwood, Jr. 



Concretions— freaks in stone, by R. S. Bassler. 



Biology and human trends, by Raymond Pearl. 



The relation of genetics to physiology and medicine, by Thomas Hunt Morgan. 



Conservation of the Pacific halibut, an international experiment, by William F. 

 Thompson. 



The swallowtail butterflies, by Austin H. Clark. 



Those ubiquitous plants called algae, by Florence E. Meier. 



The Boulder Canyon project, by Wesley R. Nelson. 



Wings over the sea, by Louis Bl^riot. 



The coming of man from Asia in the light of recent discoveries, by AleS 

 HrdliCka. 



The antiquity of man in America in the light of archeology, by N. C. Nelson. 



A survey of southwestern archeology, by Frank H. H. Roberts, Jr. 



Nuzi and the Hurrians : The excavations at Nuzi (Kirkuk, Iraq) and their 

 contribution to our knowledge of the history of the Hurrians, by Robert H. 

 Pfeiffer. 



The ruins of Tenampua, Honduras, by Dorothy H. Popenoe. 



Report for 1936. — The report of the Secretary, which included the 

 financial report of the executive committee of the Board of Regents, 

 and will form part of the amiual report of the Board of Regents to 

 Congress, was issued in January 1937. 



Report of the Secretary of the Smithsonian Institution and financial report of 

 the executive committee of the Board of Regents for the year ending June 30, 

 1936. 107 pp., 2 pis. (Publ. 3404.) 



Tlie report volume, containing the general appendix, was in press 

 at the close of the year. 



SPECIAL PUBLICATIONS 



Explorations and field work of the Smithsonian Institution in 

 1936. 100 pp., 98 figs. (Publ. 3407.) April 6, 1937. 



