INDEX 



697 



*Wheatstone bridges and acces- 

 sory apparatus for resistance ther- 

 mometry. 563. 



Norton, J. B. Eastern and western 

 migrations of Smilax into North 

 America. 281. 



Nutting, P. G. Criteria for gray ra- 

 diation. 476. 



Pack, R. W. fStructural features of 

 the San Joaquin Valley oil fields, 

 California. 309. 



Parker, G. L. *Water powers of the 

 Cascade Range. Part 111. Ya- 

 kima River basin. 225. 



Parsons, C. L. fRadium. 306. 



Peffer, E. L. *Density and thermal 

 expansion of American petroleum 

 oils. 664. 



Pierce, C. H. *Conditions requiring 

 the use of automatic gages in ob- 

 taining records of stream flow. 

 452. 



*Relation of stream gaging to the 



science of hydraulics. 450. 



PiLLSBURY, J. E. fOcean currents 

 and deep sea explorations of the 

 U. S. Coast and Geodetic Survey. 

 261. 



Pittier, Henry. Inophloeum, a new 

 genus of the mulberry family. 112. 



*New or noteworthy plants from 



Colombia and Central America — 

 5. 360. 



*On the characters and relation- 

 ships of the genus Monopteryx 

 Spruce. 295. 



Pogue, J. E. *Quaternary deposits, 

 igneous rocks, and glaciation of 

 the Broad Pass region, Alaska.' 95. 



Poor, C. L. fOceanic tides, with 

 special reference to the work of 

 the U. S. Coast and Geodetic 

 Survey. 266. 



Popenoe, Paul. ]Catha edulis, a 

 narcotic of the southern Arabs. 

 103. 



fProgress in the study of human 



heredity. 315. 



Priest, I. G. fSimple spectral color- 

 imeter of the monochromatic 

 type. 74. 



Pritchard, F. J. fSome recent in- 

 vestigations in sugar-beet breed- 

 ing. 99. 



Putnam, G. R. fThe Lighthouse Ser- 

 vice and its relation to the U. S. 

 Coast and Geodetic Survey. 263. 



Ransome, F. L. Contributions to 

 economic geology, 1915. Part I. 

 Metals and non-metals except 

 fuels. 615. 



*Some Paleozoic sections in Ari- 

 zona, and their correlation. 681. 



Redfield, W. C. fScope and needs 

 of the U. S. Coast and Geodetic 

 Survey. 267. 



Ricker, P. L. fThe first Washington 

 Botanical Society. 100. 



fNotes on variations in Chinese 



chestnuts. 102. 



Ritter, Paul. fHassler, the organ- 

 izer of the U. S. Coast and Geo- 

 detic Survey. 267. 



Rogers, G. S. fOil field waters and 

 their chemical relations to oil. 

 189. 



Rosa, E. B. investigation of car- 

 tridge enclosed fuses: Report of 

 the Bureau of Standards. 632. 



Summary of experiments on the 



silver voltameter at the Bureau of 

 Standards. 478. 



*Volume effect in the silver vol- 

 tameter. 500. 



Rose, J. N. Botanical explorations 

 in South America. f24, f636. 



Roundy, P. V. *Revision of the 

 Beckwith and Bear River forma- 

 tions of southeastern Idaho. 565. 



fSome Jurassic and Cretaceous 



formations of southeastern Idaho. 

 157. 



Safford, W. E. -(Agriculture in pre- 

 Columbian America. 520. 



Identity of cohoba, the narcotic 



snuff of ancient Haiti. 547. 



