488 



INDEX: 



Thorium, radio-activity of, Dadou- 

 rian, 4 27. 



— compounds, radio-activity, McCoy 

 and Ross, 438. 



— minerals and salts, radio-activity, 

 Bolt wood, 415. 



Todd, D., total solar eclipse, Jan., 



1907, 245. 

 Trowbridge, C. C, interlocking of 



feathers in flight of birds, 145. 

 Trowbridge, J., magnetic field and 



coronal streamers, 189 ; telephone 



relay, 339. 



U 



Wilson, A. W. G., glaciation of Or- 

 ford and Sutton Mts., Quebec, 196. 



Winton, A. L., Microscopy of Veg- 

 etable Foods, 335. 



Wisconsin, lead and zinc deposits, 

 Grant, 470. 



Wright, F. E., optical study of 

 wollastonite and pseudo-wollaston- 

 ite, 103 ; determination of feldspars, 

 361. 



Wyoming, coal resources, 473. 



X 



United States, economic geologv of, 

 Eies, 256. 



— see Coast Survey, Geol. Re- 

 ports, National Museum, Observ- | ZOOLOGY — 

 atory. 



X-ray, new kind. Seitz, 80. 

 — see Rontgen rays. 



V 



Veatch, A. C, localities of supposed 



Jurassic fossils, 457. 

 Venice, Lagoon of, 407. 

 Verrill, A. H., new species of Dy- 



nastes, Dominica, 317 ; avifauna of 



Dominica, 337. 

 Virginia, lead and zinc deposits, 



Watson, 255. 



W 



White, W. P., polymorphic forms 

 of calcium metasilicate, 89. 



Williston, S. W., North American 

 Plesiosaurs, 221. , 



Avifauna of Dominica, A. H. Ver- 

 rill, 337. 



Birds, interlocking of feathers in 

 flight, Trowbridge, 145. 



— of the Southern Lesser Antilles, 

 Clark, 337. 



Corals, Madreporian, in British 

 Museum, 474. 



Crustacea of Norway, Sars, 837. 



Dynastes, new species from Domin- 

 ica, Verrill, 317. 



Echinoderma, Bather, 330. 



Invertebrates of Boston Soc. Natj 

 History, Sheldon, 336, 475. 



Isopods of No. America, Richard- 

 son, 337. 



Lagenidas, developmental stages, 

 Cushman, 180. 



