628 



INDEX 



t Washington, D. C, Geological 

 areas. E. T. Wherry. 435. 



* Wilcox group (Eocene), geologic 

 history of. E. W. Berry. 601. 



See also: Economics; Engineering; 

 Geography; Gravitation; Miner- 

 alogy; Paleontology; Petrology. 

 Geophysics. fCooling of a lava sur- 

 face. A. L. Day. 194. 



fCrystals, growing, linear force of, 



J. C. HOSTETTER. 195. 



Live aa lava at Kilauea. T. A. 



Jaggar, Jr. 241. 

 jOrigin of the earth's electric charge. 



W. F. G. Swann. 270. 

 Thermal gradient of Kilauea Lava 



Lake. T. A. Jaggar, Jr. 397. 

 References. 465. 

 Gravitation. *Investigations of grav- 

 ity and isostasy. William Bowie. 



159. 

 References. 466. 

 History. Philosophical Society of 



Washington, origin and early days 



of. W. H. Dall. 475. 

 tScientific societies in Washington, 



development of. F. W. Clarke. 



475. 

 Magnetism. *Fahy permeameter. C. 

 W. Burrows and R. L. Sanford. 

 562. 

 ♦Uniformity of bars for magnetic 

 standards. R. L. Sanford. 14. 

 Mammalogy. fAmerican flying squir- 

 rels, notes on. A. H. Howell. 

 358. 

 ]Aplodontia, notes on. W. P. Tay- 

 lor. 272. 

 References. 40. 

 Mathematics. Multiple algebra: The 

 reduction of real dyadics and the 

 classification of real homogeneous 

 strains. E. B. Wilson. 173. 

 Medical Zoology. Carriage of disease 

 by insects. L. O. Howard. 217. 

 Metallography. *Coating on tinned 

 copper, corrosion of. P. D. Me- 

 rica. 161. 



References. 470. 



Meteorology. fAerology in aid of 



aeronautics. C. F. Marvin. 543. 



Mineralogy. Alunite, psilomelanite, 



andtitanite. E. T. Wherry. 267. 



Aurichalcite from Big Cottonwood 



Canyon, Utah. A. Ledoux. 361. 



fCalcite in silicified wood. E. T. 



Wherry. 433. 

 *Glauberite crystal cavities in the 

 Triassic rocks of eastern Pennsyl- 

 vania. E. T. Wherry. 268. 

 Halloysite from Colorado. E. S. 

 Larsen and E. T. Wherry. 178. 

 Ilsemannite, hydrous sulphate of 

 molybdenum. W. T. Schaller. 



417. 

 Leverrierite from Colorado. E. S. 



Larsen and E. T. Wherry. 208. 

 Magnesioludwigite, a new mineral. 



B. S. Butler and W. T. Schaller. 



29. 

 *Miloschite, American occurrence of. 



E. T. Wherry and G. V. Brown. 



393. 

 Minasragrite, a hydrous sulphate 



of vanadium. W. T. Schaller. 



501. 

 Mineralogic notes. E. S. Larsen 



and G. Steiger. 6. 

 Neodymium as cause of red-violet 



color in certain minerals. E. T. 



Wherry. 143. 

 Native element minerals, nomen- 

 clature and classification of. E. 



T. Wherry. 447. 

 Rhodochrosite and siderite, indices 



of refraction of. E. T. Wherry 



and E. S. Larsen. 365. 

 Spencerite, crystal form of. T. L. 



Walker. 456. 

 Tungstenite, a new mineral. R. C. 



Wells and B. S. Butler. 596. 

 See also: Crystallography. 

 Oceanography. Instrument for density 



measurements on board ship. A. 



L. Thuras. 605. 



