AUTHOR-SUBJECT INDEX, 1849-1961 



173 



Space exploration 



The challenge of space exploration, by 

 Robert C. Seamans, Jr. 1961: 263- 

 274 

 Spainhour, J. Mason, Antiquities in Le- 

 noir County, North Carolina. 1871: 

 404-406 

 Spalding, Volney M., Present problems 



in plant ecology. 1909: 453-463 

 Sparrows 

 House sparrow, by J. O. Skinner. 

 1904: 423-428 

 Spear, F. G., Medical uses of the cyclo- 

 tron. 1945: 137-151 

 Spears, John R., Corbin Game Park. 



1891: 417-423 

 Specific gravity 



Variations of specific gravity, by G. W. 

 A. Kahlbaum. 1904: 261-266 

 Spectra 

 Beyond the red in the spectrum, by 



H. D. Babcock. 1930: 165-176 

 Dr. Aston's experiments on the mass 

 spectra of the chemical elements, 

 with introduction by C. G. Abbot. 

 1920: 223-246 

 Results of spectrum analysis applied 

 to the heavenly bodies, by William 

 Huggins. 1866: 195-208 

 The new spectrum, by S. P. Langley. 

 1900: 683-692 

 Spectroheliocraphs 



Rumford spectroheliograph of the 

 Yerkes Observatory, by George E. 

 Hale and Ferdinand Ellerman. 

 1904: 131-162 

 Spectroscopes 



Master key of science: revealing the 

 universe through the spectroscope, 

 by Henry Norris Russell. 1932: 

 133-139 

 Spectroscopy 



Celestial spectroscopy, by William 



Huggins. 1 891: 69-102 

 Spectroscopy in industry, by George R. 

 Harrison. 1939: 203-213 



Speech 



History and varieties of human speech, 

 by Edward Sapir. 19 12: 573-595 



Speiser, E. A., Closing the gap at Tepe 

 Gawra. 1939: 437-445 

 Historical significance of Tepe Gawra. 

 1933: 415-427 



Spenceley, F., and Hamlin, Benson, 

 Comparison of propeller and reac- 

 tion-propelled airplane perform- 

 ances. 1947: 429-457 



Spencer, L. J., Meteorite craters as topo- 

 graphical features on the earth's sur- 

 face. 1933:307-325 



Spencer Jones, Harold, Determination of 

 precise time. 1949: 189-202 

 Is there life in other worlds? 1939: 



145-156 

 Solar activity and its terrestrial effects. 

 1955: 227-240 



Sphagnum moss 



Sphagnum moss: war substitute for 

 cotton in absorbent surgical dress- 

 ings, by George E. Nichols. 191 8: 

 221-234 



Spiders 



Black widow spider, by Fred E. 

 D'Amour and others. 1938: 405- 

 422 



Spinden, Herbert J., Indian manuscripts 



of southern Mexico. 1933: 429-451 



Mexican calendars and the solar year. 



1948: 393-405 

 Population of ancient America. 1929: 



451-471 

 Sun worship. 1939: 447-469 



Spink, Wesley W., Sulfanilamide and re- 

 lated chemicals in the treatment of 

 infectious diseases. 1940: 479-488 



Spitzer, Lyman, Jr., Formation of stars. 

 1949: 153-160 



Spoehr, H. A., Photosynthesis and the 

 possible use of solar energy. 1922: 

 175-185 



Spofford, Ainsworth P., Memorial to Dr. 

 Joseph M. Toner. 1896: 637-643 



