INDEX 



547 



*A key to common Nebraska 



shrubs. 456. 



*The phylogeny of grasses. 119. 



*A synopsis of the red firs. 167. 



Larsen, E. S. Magnetite basalt from 

 North Park, Colo. 449. 



*Mixtures of amorphous sulfur and 



selenium as immersion media for 

 the determination of high refrac- 

 tive indices with the microscope. 

 114. 



Latheop, Elbert C. *Chemical 

 changes in heated soils. 261. 



*The chemistry of steam-heated 



soils. 256. 



*Guanine from a heated soil. 253. 



*Normal and abnormal constitu- 

 ents of soil organic matter. 252. 



LeClerc, J. A. *Effect of lime upon 

 the alkali tolerance of wheat seed- 

 lings. 197. 



*Influence of environment upon 



the composition of wheat. 262. 



Lee, Willis T. *Coal fields of Grand 

 Mesa and the West Elk Moun- 

 tains, Colorado. 362. 



*Recent discovery of dinosaurs in 



the Tertiary. 173. 



Leffingwell, E. DeK. *Reconnais- 

 sance of the Arctic Slope of Alaska. 

 343. 



Leonard, A. G. *Bismark, N. Dak., 

 folio. 466. 



Leverett, Frank. *Time relations of 

 glacial lakes in the Great Lakes 

 region. 237. 



Lewis, W. S. *Physical testing of 

 cotton yarns. 167. 



Lewton, Frederick L. *Cotton of the 

 Hopi Indians: a new species of 

 Gossypium. 24. 



*Kokia: a new genus of Hawaiian 



trees. 25. 



— ■ — *Rubelzul cotton: a new species of 

 Gossypium from Guatemala. 24. 



LiLLiE, Ralph S. *Physico-chemical 

 conditions of anesthetic action. 

 340. 



LiNDEMUTH, J. R. *Analysis of cer- 

 tain Pacific coast kelps. 262. 



LoTKA, Alfred J. A natural popula- 

 tion norm. I. 241. 



A natural population norm. IL 



289. 



LouGHLiN, G. F. *Reconnaissance in 

 the Southern Wasatch Mountains. 

 50. 



Lyon, Marcus, Jr. *Tree-shrews. 

 268. 



Maddren, a. G. *Geology of the Koy- 

 ukuk-Chandalar region, Alaska. 

 528. 



McCoLLUM, Burton. *Electrolysis in 

 plain and reinforced concrete. 361. 



McCuRDY, George Graves. *Ancient 

 man, his environment and his art. 

 307. 



McDaniels, a. S. The silver volta- 

 meter. III. 40. 



McNeil, H. C. *]Moisture determina- 

 tion by means of calcium carbide. 

 129. 



Marsh, C. D. *Stock poisoning by 

 larkspur. 427. 



Maxon, Wm. R. a new genus of 

 davallioid ferns. 143. 



Merriam, C. Hart. *Notes on the 

 big bears of North America. 428. 



*Remarkable extinct fauna of 



southern California revealed in the 

 asphalt deposits near Los Angeles. 

 428. 



Mertie, J. B., Jr. *Igneous rocks of 

 the Raton Mesa Region. 302. 



Merwin, H. E. Calcium vanadates 

 from Peru, Colorado and Utah. 

 157. 



*Some special features df the glaci- 



ation of the Catskill Mountains. 

 539. 



* Abstracts. 



