AUTHOR-SUBJECT INDEX, 1849-1961 



171 



Social conditions 



Social and religious condition of the 

 lower races of man, by John Lub- 

 bock. 1869: 341-362 

 Society 



Evolution of modern society in its his- 

 torical aspects, by R. D. Melville. 

 1894: 507-521 



Science, technology, and society, by 

 L. R. Hafstad. 1957: 207-220 

 Soddy, Frederick, and Ramsay, William, 

 Experiments in radioactivity and the 

 production of helium from radium. 

 1903: 203-206 

 Sohncke, L., Law of the variation of tem- 

 perature in ascending moist currents 

 of air. 1877:418-421 

 Soils 



Burrowing rodents of California as 

 agents in soil formation, by Joseph 

 Grinnell. 1923: 339-350 



Influence of man on soil fertility, by 

 G. V. Jacks. 1957: 325-337 



Lessons from the Old World to the 

 Americas in land use, by Walter 

 Clay Lowdermilk. 1943:413-427 



Modern soil science, by Charles E. Kel- 

 logg- 1949 : 227-246 



Place of tropical soils in feeding the 

 world, by Robert L. Pendleton. 

 1955: 441-458 



Snails and their relations to the soil, 

 by Harley J. Van Cleave. 1952: 

 273-282 



Soil acidity — its nature, measurements, 

 and relation to plant distribution, by 

 Edgar T. Wherry. 1920: 247-268 



Soil erosion: the growth of the desert 

 in Africa and elsewhere, by Daniel 

 Hall. 1938: 303-315 



Utilizing our soil resources for greater 

 production, by Robert M. Salter. 

 1951: 319-333 

 Sokeland, Herrmann, On ancient desem- 



ers or steelyards. 1900:551-564 

 Solar eclipses 



Discoveries from solar eclipse expedi- 

 tions, by S. A. Mitchell. 1937: 145- 

 167 



632372 — 62 12 



Eclipse of the sun, April 25, 1865, by 

 de Prados. 1864:258-260 



Solar eclipse of July 18, i860, by J. La- 

 mont. 1864: 240-257 



Solar eclipse of May 28, 1900, by S. P. 

 Langley. 1900: 149-154 

 Solar energy 



Artificial converters of solar energy, by 

 H. C. Hottel. 1 941: 151-162 



Photosynthesis and the possible use of 

 solar energy, by H. A. Spoehr. 1922: 

 175-185 



Solar radiation as a power source, by 

 Charles G. Abbot. 1943: 99-107 



Use of solar energy for heating water, 

 by F. A. Brooks. 1939:157-181 



Utilization of solar energy, by A. S. E. 

 Ackermann. 1915: 141-166 



Utilizing the sun's energy, by Robert 

 H. Thurston. 1901 : 263-270 

 Solar radiation 



Biological effects of solar radiation, by 

 Brian O'Brien. 1943: 109-134 



Geochronology, as based on solar ra- 

 diation, and its relation to archeol- 

 ogy, by Gerard De Geer. 1928: 

 687-696 



Radiation in the solar system, by J. H. 

 Poynting. 1904: 185-193 



Radiation of the sun, by C. G. Abbot. 



1912: 153-165; 1914: ^i-^ 



Solar constant of radiation, by C. G. 



Abbot. 1 910: 319-328 

 Solar radiation, by C. G. Abbot. 1932 : 



107-120 

 Solar radiation and the state of the 



atmosphere, by Harlan True Stetson. 



1942: 151-171 

 Solar radiation as a power source, by 



C.G.Abbot. 1943: 99-107 

 Solar radiation researches by Jules 



Cesar Janssen, by A. de la Baume 



Pluvinel. 1909: 243-251 

 Twenty-five years' study of solar radia- 

 tion, by C. G. Abbot. 193 1: 175- 



198 



