572 



INDEX. 



Temperature, measurements of high, 



Day and Sosman, 93. 

 Thermometer, nitrogen, Day and 



Sosman, 93. 

 Thornton, W. M., Jr., enargite, 



covellite and pyrite, 358. 

 Travis, C, crystals in light parallel 



to an optic axis, 427. 

 Trigonometry, Plane, Robbins, 200. 

 Trowbridge, J., electric discharges 



through hydrogen, 341. 



United States Coast Survey, report, 

 559. 



United States geol. survey, see 

 GEOLOGICAL Reports. 



Urals, northern, geology and petro- 

 graphy, Duparc, 272. 



Van Name, R. G., velocities of reac- 

 tions between metals and dissolved 

 halogens, 237 ; crystals of silver 

 sulphate and dichromate, 293. 



Verrill, A. E., obituary notice of 

 Alexander Agassiz, 561. 



Virginia geol. survey, 267, 557. 



Volcanoes, Hawaiian, Brigham, 363. 



W 



Washington, H. S., feldspar from 



Linosa, 52. 

 Wellcome Research Laboratories, 



Khartoum, 3rd report, 91. 

 West Australia geol. survey, 87. 

 West Virginia geol. survey, 459. 

 Wickham, H. F., new fossil coleop- 



tera from Florissant, 47. 

 Worlds, Evolution of, Lowell, 199. 

 Wright, F. E., feldspar from Linosa, 



52 ; new petrographic microscope, 



407 ; new ocular for use with, 415. 



X-ray photography, instantaneous, 

 Dessauer, 82. 



ZOOLOGY. 



African blood-sucking flies, Austin, 



92. 

 Cambridge Natural History, 92. 

 Birds, Handlist, Sharpe, 195. 

 Vertebrates, Cave, of America, 



Eieenmann, 270. 



