556 



INDEX. 



U 



United States, Dep't of Agriculture, 



550. 



— Naval Observatory, publications, 



457. 

 — see Geol. Reports. 



Vesuvius, ammonia from eruption, 



Stoklasa, 540. 

 — radio-activity of ashes, 460. 

 Virginia, geol. survey bulletin, 87. 



W 



Walcott, C. D., Cambrian of China, 

 188. 



Warren, C. H., yttrocrasite, 515; 

 niobium and tantalum separation, 

 520. 



Wasatch, fossil bird. Loomis, 481. 



Washington, H. S., syenite of 

 Plauenscher Grund, 129 ; petrog- 

 raphy of Belknap Mountains, 439, 

 493. 



Watson, T. S., unakite in Virginia, 

 248. 



Weights and Measures, Evolution, 

 Hallock and Wade, 346. 



Wetterkunde, Bornstein, 81. 



Wilson, R. W., astronomy, 191. 



Wood, R. W., Physical Optics, 193. 



Wright, F. E., interference figures, 

 under the microscope, 19 ; schis- 

 tosity produced by crystallization, 

 224 ; optical study on the lime- 

 silica minerals, 265 ; formation of 

 minerals, MgSi0 3 , 385. 



X 

 X-rays, velocity, Marx, 461, 



Yale Observatory, transactions, 471. 



Zoology, general, Linville and Kelly, 



476. 

 — vertebrate, Pratt, 190. 



ZOOLOGY. 



Birds, origin of, Pycraft, 547. 



Flies, British Blood-sucking, Aus- 

 ten, 476. 



Frog, Biology of, Holmes, 190. 



Homoptera, Catalogue, Distant, 

 476. 



Mammals, E. Ingersoll, 191. 



