■49] 



VOLUMES XXXI-XL. 



m 



Tierwelt, die antike, Keller. 36, 



Time interval m a protective de- 



vice, study of, Wenrich, 32. 

 table, geologic, Schuchert and 



rell, 38, •• 



Titicaca Island, geologic sketch. 



gory, 36, 187. 

 Toads, poison of, Y\ ieland and 



Weil, 37, in- 



Todd, D., open-air telescope, 32, 



1: optical resolution oi the Sa- 



turnian ring, 33, 152; Amherst 



ipse Expedition oi 1914, 38, 



Tohoku Imperial University, Sci- 

 ence reports. 33, 597; 38, "4- 



Tonquist, work on tonics, 



36. 



Torossian, G.. reduction tests for 

 acid. 38. 537, 



Torqu-. by light. Barlow, 



34. 

 Tower, O. F., Chemical Analy- 



Triassic, Connecticut Valley, life 

 M. Talbot. 31, 469; Lull, 33, 



— See GEOLOGY. 



Tridymite, see Quartz, MINER- 

 ALS. 



Trigonometry, Kenyon and lu- 

 poid. 37, 364; Robbins. 31. 248. 



Trinidad, Paleontology. Maury. 



37, "5- 



Tripyramid Mountain. X. H.. ge- 

 n and Rice. 31. 

 phy, Pirsson, 31. 405- 

 Trisection of angles. Uhler, 33, 



506. 

 Trotter, A. P., Illumination, 33, 



61. 

 Trowbridge, J., new emission the- 

 ory of light, 31, 5*« 

 Troxell, E. L., Unios in the Tri- 

 of Massachusetts, 38, 460; 

 vertebrate fossils of Rock 

 Creek, Texas. 39, 613; 

 ruminant from Texa-. 40, 479. 

 Turin Royal Academy. 32, 236. 

 Turner, W. A., determination of 



• bur. 38, 41. 

 Tutton. A. E. H., Crysti 



Twenhofel, W. H., physiography 



• >dules 



■ 



ures, 38, 157; black shale in 



the making. 40, 2~::. 

 Twiss, G. R., Physics, 32. 68. 



U 



Udden, J. A., ago of Castile gyp- 

 sum and Rustler Sprjngs for- 

 mation. 40, 151. 



Uhler, H. S., notes on Maske- 

 lyne's "trisection oi an angle," 

 33, 506; deviation produced by 

 prisms, 35, 389; arc spectrum of 

 tellurium, 36, b>5- 



Ulrich, E. O., the Chattanoogan 

 series, 34, *57« 



Umplebv, J. B., custerite. 36, 385. 



United States, see Coast Survey, 

 Geol. Reports, Mines, Bureau 

 of, National Museum, etc. 



— — Geology. Blackwelder. 35, 

 332. 



production of minerals in 



1909, Parker. 31, 575; of gems 

 and precious stones, Sterrett, 

 1909. 31, 576; 1910, 32, 398; 191 t, 

 35, 198; 1912, 36, 656; 1913. 38, 

 4S7. 



Uranium, disintegration products, 

 Antonoff. 32, 4(10. 



— hexafluoride, Ruff and Hein- 

 zelmann, 32, 319. 



— minerals, radium content- of, 

 Marckwald and Russell, 31, 566. 



— Sec Radio-activity. 

 Uranium-X;. a new element, Fa- 



jans and Gohring, 36, 565. 

 Utah, Beaver Co. minerals, But- 

 ler and Schaller, 32, 418. 



— Paleozoic section in, Richard- 

 son, 36, 406. 



— stream piracy in, Anderson, 

 40, 314. 



Valency. Loring, 36, 564. 

 Vanderbilt, S. B.. Food Industries, 



39, 136. 



Van Horn, F. R., new occurrence 



of pearceite, 31, 518; formulas 



of pearceite and polybasite, 32, 



40: cerussite twins, Mexico, 32, 



Mexican minerals, 35, 2 3'. 



pisanite and arsenopyrite, Ten- 



; , urnonite crys- 



Utah, 40, [45. 



