164 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1952 



No. 9. Precipitation and temperature in Washington, D. C, for 1951 and 1952, 



by C. G. Abbot. 5 pp., 2 figs. (Publ. 4087.) Mar. 18, 1952. 

 No. 10. Periodicities in the solar-constant measures, by C. G. Abbot. 31 pp., 



6 figs. (Publ. 4088.) May 28, 1952. 

 No. 11. Important interferences with normals in weather records, associated with 



sunspot frequency, by C. G. Abbot. 3 pp., 1 fig. (Publ. 4090.) May 20, 1952. 



VOLUME 118 



Smithsonian Logarithmic Tables (to base e and base 10), by George Wellington 

 Spenceley, Rheba Murray Spenceley, and Eugene Rhodes Epperson. Whole 

 volume, xii+402 pp. (Publ. 4054.) [Mar. 26] 1952. 



ANNUAL REPORTS 



Report for 1950. — The complete volume of the Annual Report of the 

 Board of Regents for 1950 was received from the printer on October 

 15, 1951 : 



Annual Report of the Board of Regents of the Smithsonian Institution showing 

 the operations, expenditures, and condition of the Institution for the year 

 ended June 30, 1950. ix+522 pp., 84 pis., 47 figs. (Publ. 4025.) 



The general appendix contained the following papers (Pubis. 4026- 

 4044) : 



Beyond the Milky Way, by Thornton Page. 



The luminous surface and atmosphere of the sun, by Bertil Lindblad. 



What is an elementary particle? by E. Schrodinger. 



The composition of our universe, by Harrison Brown. 



The Wright Brothers as aeronautical engineers, by M. P. Baker. 



Chemical achievement and hope for the future, by Linus C. Pauling. 



Electroencephalography, by W. Grey Walter. 



Energy from fossil fuels, by M. King Hubbert. 



Permafrost, by Robert F. Black. 



Earthquakes in North America, by B. Gutenberg. 



Wolf Creek meteorite crater, Western Australia, by D. J. Guppy and R. S. 



Matheson. 

 Natural history in Iceland, by Julian Huxley. 

 Praying mantids of the United States, native and introduced, by Ashley B. 



Gurney. 

 Man's disorder of nature's design in the Great Plains, by P. W. Albertson. 

 Food shortages and the sea, by Daniel Merriman. 

 Economic uses of lichens, by George A. Llano. 

 The origin and antiquity of the Eskimo, by Henry B. Collins. 

 Archeology and ecology on the Arctic slope of Alaska, by Ralph S. Solecki. 

 Samuel Seymour : Pioneer artist of the Plains and the Rockies, by John Francis 



McDermott. 



Report for 1951. — The Report of the Secretary, which will form 

 part of the Annual Report of the Board of Regents to Congress, was 

 issued January 18, 1952 : 



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

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

 1951. ix+160 pp., 4 pis. (Publ. 4056.) 



