SUBJECT INDEX 



609 



WaIvTEnberg, R. G. *Aluminum and 

 its light alloys with copper and 

 magnesium, constitution and metal- 

 lography of. 416. 



*Aluminum, preparation and re- 

 flective properties of some alloys 

 of, with magnesium and with zinc. 

 302. 



Waring, Gerald A. *Ground water 

 in Reese River Basin and adjacent 

 parts of Humboldt River Basin, 

 Nevada. 473. 



*Ground water in the San Jacinto 



and Temecula Basins, California. 

 472. 



Washburn, Frederick M. * Constant 

 temperature still head for light-oil 

 fractionation. 48. 



Washington, Henry S. Italite: a new 

 leucite rock. 270. 



Wells, Roger C. Aragonite from 

 sea-water, unusual deposit of. 249. 



Wetmore, Alexander. *Waterfowl, 



lead-poisoning in. 202. 

 Wheeler, William Morton. *Ants 



of Borneo. 110. 



*Ants of Cocos Island. 22. 



*Ants of Galapagos Islands. 23. 



Wherry, Edgar T. Determining acid- 

 ity and alkalinity of soil by indi- 

 cators in the field. 217. 



Sulfide minerals, nomenclature 



and classification of. 487. 



White, Walter P. * Potentiometers 

 for thermoelement work. 41. 



Thermostats, methods of increas- 

 ing the precision of. 429. 



WhiTmore, L. M. *Sole leather, effects 

 of glucose and salts on wearing 

 quality of. 178. 



Wickham, H. F. *Asaphidion (Coleop- 

 tera-Carabidae), two new species 

 of, from North America. 110. 



fCarabidae from Alaska, two 



new. 279. 



Wilhelm, R. M. *Standardized 

 method for the determination of 

 solidification points, especially of 

 naphthalene and paraffin. 42, 



Williams, R. W. *Winter birds of 

 East Goose Creek, Florida. 205. 



Williamson, E. D. fEarthquakes and 

 the elastic properties of the earth. 

 498. 



Wise, D. M. fSolar eclipse, total at 

 Sobral, Brazil, May 29, 1919. 113. 



Wright, F. E. fContrast sensibility 

 of the eye as a factor in the re- 

 solving power of the microscope. 

 475. 



Graphical method of plotting 



reciprocals. 185. 



Trigonometric computer, a. 29. 



SUBJECT INDEX 



Agriculture. *Grasses of the United 

 States, genera of, with special 

 reference to economic species. A. 

 S. Hitchcock. 391. 



§Meyer memorial medal. 383. 



*Barley pollen, germination of. 

 Harry V. Harlan. 391. 



*Surface formations and agricultural 

 conditions in southern half of 

 Minnesota. Frank Leverett and 

 F. W. Sardeson. 471. 

 Analytical Chemistry. *Carbonate and 

 silicate rocks, analysis of. W. F. 

 HillEbrand. 299. 



*Hydrochloric acid color method for 

 determining iron. J. C. Hostet- 

 TER. 208. 



* Interferometer, application of the, 

 to gas analysis. Junius D. Ed- 

 wards. 415. 



*Lead, method for determination of 



the volatile matter in oxides of. 



Olaf Andersen. 208. 

 *Optical glasses, rapid electrometric 



determination of iron in some. 



J. B. Ferguson and J. C. Hos- 



TETTER. 45. 



