INDEX 



621 



Smith, E. F. *Mechanism of tumor 

 growth in crown gall. 187. 



Smith, G. O. fGeology and public 

 service. 193. 



Smith, H. M. fExploitation of ne- 

 glected aquatic resources. 165. 



Smith, W. H. *Recovery of paraffin 

 and paper stock from waste paraffin 

 paper. 39. 



Sosman, R. B. Some problems of the 

 oxides of iron. 55. 



Standley, P. C. *The Mexican and 

 Central American species of Ficus. 

 566. 



Stanton, T. W. fA Cretaceous vol- 

 canic ash bed on the Great Plains 

 in North Dakota. 80. 



Contribution to the geology and 



paleontology of San Juan County, 

 New Mexico. 3. Nonmarine Cre- 

 taceous invertebrates of the San 

 Juan basin. 185. 



Stebinger, Eugene. *Anticlines in 

 the Blackfeet Indian Reservation, 

 Montana. 264. 



*Possibilities of oil and gas in 



north-central Montana. 77. 



Steiger, George. Mineralogic notes. 

 6. 



Stephenson, L. W. *North Ameri- 

 can Upper Cretaceous corals of 

 the genus Micrabacia. 39. 



Tongue, a new stratigraphic term, 



with illustrations from the Missis- 

 sippi Cretaceous. 243. 



Stimson, H. F. A two-stage mercury 

 vapor pump. 477. 



Stose, G. W. fAge of certain shales 

 in Cumberland-Lebanon Valley, 

 Pennsylvania. 82. 



tCorals growing along the coast of 



Delaware. 432. 



Stringham, Emerson. fThe shad and 

 its relatives in the Mississippi 

 River. 201. 



Sudworth, G. B. fDistribution of 

 trees in the District Flora area. 

 435. 



Swann, W. F. G. fOn the absorption 

 of energy by an electron. 19. 



fOrigin of the earth's electric 



charge. 270. 



Sw anton, J. R. Significance of the 

 terms for brother and sister among 

 primitive peoples. 31. 



fSome anthropological misconcep- 

 tions. 395. 



and others. fProblems connected 



with the distribution of the aborig- 

 inal population of America. 202. 



Swick, C. H. *Triangulation in Geor- 

 gia. 584. ' 



Swingle, W. T. jJiehavior of Citrus 

 hybrids. 87. 



fThe wild relatives of our crop 



plants; their value in breeding; 

 how to secure them. 167. 



Tate, J. T. Anode resistance films. 

 593. 



Probe-wire measurements of anode 



fall of potential. 482. 



The resonance and ionization po- 

 tentials for electrons in sodium 

 vapor. 517. 



Taylor, A. H. jA normal eye for the 

 photometry of lights of different 

 color. 17. 



Taylor, H. F. fA mortality of fishes 

 on the west coast of Florida. 

 166. 



Taylor, W. P. fNotes on Aplodontia. 

 272. 



Thom, Charles. fSome natural groups 

 in Aspergillus. 315. 



Thompson, H. C. fExperiments in 

 the use of peat in the greenhouse. 

 116. 



Thuras, A. L. An instrument for ac- 

 curate and rapid density measure- 

 ments on board ship. 605. 



Tillyer, E. D. *An investigation of 

 the axial aberrations of lenses. 

 585. 



True, R. H. JNotea on the life of 

 John Bradbury. 44. 



