694 



INDEX 



Babcock, W. H. fSome anthropo- 

 logical and national factors in the 

 present war. 333. 



Bailey, H. S. *The peanut a great 

 American food. 632. 



Bailey, Veknon. fHow the pine 

 squirrels help to feed the bears of 

 the Yellowstone Park. 28. 



Baird, G. W. fAn unusual human 

 specimen. 28. 



Baker, O. E. *Geography of the 

 world's agriculture. 449. 



Ball, C. R. fThe grain sorghums: 

 a botanical grouping of varieties 

 cultivated in the United States. 

 295. 



Barrett, O. W. fA promising new 

 source of sugar. 212. 



Bartsch, Paul. *Additions to the 

 Haitian avifauna. 133. 



Classification of the Philippine 



operculate land shells of the 

 family Helicinidae, with a synop- 

 sis of the species and subspecies 

 of the genus Geophorus. 643. 



A key to the subspecies of 



, Leptopoma nitidum Sowerby of the 



Philippine Islands. 532. 



A key to the Philippine sub- 

 species of Ohha marginata with 

 notes on their distribution. 60. 



Land moUusks of the genus 



Obba from the islands of Bohol 

 and Pangalao, P. I. 16. 



The land shells of the genus 



Amphidromus from the islands of 

 the Palawan Passage. 361. 



Bassler, R. S. fPaleozoic rocks and 

 fossils on the Piedmont of Mary- 

 land. 411. 



Bastin, E. S. fGenesis of the ores at 

 Tonopah, Nevada. 101. 



Bates, P. H. *The properties of 

 Portland cement having a high 

 magnesia content. 250. 



Bauer, L. A. fCorresponding 



changes in the earth's magnetic 

 state and in solar activity, 1888- 

 1916. 506. 



Beal, C. H. *Geologic structure in 

 the Gushing oil and gas field, 

 Oklahoma, and its relation to the 

 oil, gas, and water. 172. 



Becker, G. F. §The one hundredth 

 anniversary of the founding of the 

 American Journal of Science. 

 263. 



Birdseye, C. fThe fur industry of 

 Labrador. 28. 



Blackwelder, Eliot. New geolog- 

 ical formations in western Wyom- 

 ing. 417. 



BowEN, C. F. *Phosphatic oil shales 

 near Dell and Dillon, Beaverhead 

 County, Montana. 248. 



BowEN, N. L. *Adirondack intru- 

 sives. 206. 



Crystals of barium disilicate in 



optical glass. 265. 



*The problem of the anortho- 



sites. 205. 



The significance of glass-making 



processes to the petrologist. 88. 



Bowie, William. fPrimary triangu- 

 lation and precise leveling as 

 done by the United States Coast 

 and Geodetic Survey. 105. 



Bowles, Oliver. *The structural 

 and ornamental stones of Minne- 

 sota. 453. 



Bownocker, J. A. *The coal fields 

 of the United States. The coal 

 fields of Ohio. 451. 



Bragg, J. G. *Tests of large bridge 

 columns. 609. 



Brooks, Charles. *Irrigatioii ex- 

 periments on apple-spot diseases. 

 563. 



Brown, Nellie A. *Some bacterial 

 diseases of lettuce. 564. 



Bryan, Kirk. fClassification of 

 springs. 412. 



Campbell. M. R. *The coal fields of 

 the Ujiited States. General intro- 

 duction. 502. . 



fSubdivisions of the Allegheny 



Plateaus. 410. 



