INDEX 



705 



Webster, D. L. fEmission quanta 

 phenomena in X-rays. 292. 



Weeks, P. T. fThe efficiency of pro- 

 duction of X-rays. 253. 



Wegmanx, C. H. *The Salt Creek 

 oil fjeld, Wyoming. 538. 



Weibel, E. E. An electrical instru- 

 ment for recording sea-water 

 salinity. 145. 



Wells, P. V. Note on the periodic 

 system of the elements. 232. 



Wells, R. C. *New determinations 

 of carbon dioxide in water of the 

 Gulf of ]\Iexico. 539. * 



fTungstonite, disulphide of 



tungsten, a new mineral. 98. 



Wessling, H. L. *The chemical anal- 

 ysis of wheat-flour substitutes 

 and of the breads made therefrom. 

 662. 



Weston, W. H. fThe downy mil- 

 dews of maize: their origin and 

 distribution. 43. 



Wetmore, Alexander. *An abnor- 

 mal egg of Fulica americana. 

 407. 



*A new cuckoo from New Zea- 

 land. 409. 



*The birds of Desecheo Island, 



Porto Rico. 607. i 



*0n the fauna of the Great 



Salt Lake. 409. 



*A new honey-eater from the 



Marianne Islands. 409. 



fLead poisoning in waterfowl. 



374. 



*The relationships of the fossil 



bird Palaeochenoides mioceanas. 

 408. 



*0n certain secondary sexual 



characters in the male ruddy 

 duck, Erismatura jamaicensis 

 (Gmelin). 409. 



— — *Winter birds aboxit Washing- 

 ton, D. C., 1916-1917. 407. 



Wherry, E. T. *The application of 

 optical methods of identification 

 to alkaloids and other organic 

 compounds. 658. 



The assignment of crystals to 



symmetry classes. 480. 



*The identification of the cin- 

 chona alkaloids by optical-crys- 

 tallographic measurements. 658. 



*Modern extensions of Hauy's 



laws of crystallography. 659. 



— ■ — PjTolusite from Virginia. 550. 



— — • The reactions of the soils sup- 

 porting the growth of certain 

 native orchids. 589. 



Certain relations between crys- 

 talline form, chemical constitu- 

 tion, and optical properties in 

 organic compounds. I, 277; II, 

 319. 



fCertain relations between 



optical properties and crystal 

 form, and their bearing on the 

 question of "crystal molecules" 

 in organic compoimds. 180. 



Wilcox, T. E. fOccurrence of the 

 California vulture in Idaho. 25. 



Williams, E. T. fThe origins of the 

 Chinese. 257. 



Williamson, E. D. fMeasurement 

 of the compressibilities of solids 

 under hydrostatic pressure up to 

 12,000 megabars. 102. 



tQuantitative applications of 



the phase rule. 75. 



Wilson, J. B. *Boron: its effect on 

 crops and its distribution in plants 

 and soil in different parts of the 

 United States. 661. 



Winchester, D. E. *Oil shale of the 

 Uinta Basin, northeastern Utah, 

 and results of dry distillation of 

 miscellaneous shale samples. 501. 



Wise, L. E. *The action of neutral 

 salts on humus, and other experi- 

 ments on soil acidity. 577. 



