INDEX. 



xxiit 



Sex ratio in the domestic fowl, T/i, 

 416 



Slipher, nebulae, vii, 403 



Smith, E. P., mechanism of over- 

 growth in plants, viii, 437 



, H. M., significant results of sci- 

 entific investigations applied to 

 fishery problems, vi 



Soper, geology of Sergipe and north- 

 eastern Bahia, Brazil, iv 



South America, eighteen new species 

 of fishes from northwestern, 673 



South American Indian in his rela- 

 tion to geographic environment, 

 -r, 281 



Spoehr, MacDougal and, growth and 

 imbibition, viii, 289 



Squier, symposium on aeronautics: 

 physical aspects, xi, 168 



Steel, spontaneous generation of 

 heat in recently hardened, viii, 353 



Stevenson, inter-relations of the fos- 

 sil fuels, x, xiii, 53 



Sulphides, spectral structure of the 

 phosphorescence of certain, 258 



Swingle, wild relatives of our culti- 

 vated plants, viii 



Tetrahedral deformations and inter- 

 continental torsions, recurrent, 445 



Torsions, intercontinental tetrahe- 

 dral deformations and, 445 



Transit instrument, description of a 

 new photographic, vi, 484 



Trelease, naming American hybrid 

 oaks, viii, 44 



Trial of animals, a little known chap- 

 ter of medieval jurisprudence, v, 

 410 



Troyan and Boyan in old Russian, 

 names of, 152 



Vision as a physical process, v 



W 



Webster, symposium on aeronautics : 

 dynamical aspects, xi, 161 



White, study of inheritance in Pi- 

 siDii, xii, 487 



Wilson, symposium on aeronautics : 

 mathematical aspects, xi, 212 



Witmer, diagnostic method of train- 

 ing intelligence, v 



Wood, condensation and evaporation 

 of metal films, vii 



minimum potential for excita- 

 tion of the " D " lines of sodium, 

 viii 



Wright, application of polarized light 

 to study of ores and metals, x 



