558 



INDEX. 



Swanton slates, 210, 217, 219, 221, 



222. 

 " Systcnie Silurieu du Centre de la 



Boheiue," tabular view of the, 



249. 



T. 



Tacouic rocks of the Grand Canon 

 (Colorado), general and ideal 

 section of the, 229. 

 " Taconic System," the, and its posi- 

 tion in stratigraphic geology, 

 174. 

 conclusion, 255. 

 geograpliieal distribution of the, 



— Norway, 235. 

 historic: 1837-18S1, 175. 

 introduction, 174. 

 lower part of the Eureka section, 



Nevada, 231. 



of Eureka (Nevada) and of the 



Grand Canon of the Colorado 



lliver (Arizona), 229. 



summary of the, by Emmons, 178. 



tabular view of the, in Eastern 



North America, 224. 

 vertical and general scctioji of 

 the : — Infra-Primordial, Pri- 

 moi'dial, and Supra-Primordial 

 Faunae, 221. 

 vertical section [Lake Cham- 

 plain] in Vermont, Canada, 

 _ and New York, 217. 

 Taconic versus Cambrian and Silu- 

 rian, 244. 

 Talinum braehypodum, 355. 

 Tension, superficial, and electrical 

 phenomena, Lippmann's ex- 

 periments upon the relation 

 between, 421. 

 Termitina, 167. 

 Tetracoceus, Engelm., 372. 



Eugelmanni, 373. 

 Thermo-electricity, relation between 



superficial energy and, 417. 

 Tigridia Dugesii, 375. 

 Titanium, aluminum, and iron, sepa- 

 ration of, 446. 

 and iron, methods of separating, 



445. 

 from aluminum, two methods of 



separating, 436. 

 precipitation of, by an alkaline 

 orthophosphatc, 439. 



Titanium and aluminum, on the sepa- 

 ration of, with a note on the 

 separation of titanium and iron. 

 435. 

 Titauophasma, Brongniart, 168. 

 Fayoli, Brongii., 169. 

 jucunda, 169. 

 libelluloides, 169. 

 Trigonotis, Stev., 260. 

 Trillium rivale, 378. 

 Troguloida, 14. 



U. 



Uredo Icdicola, Peck, 321. 

 Utica slate, 180, 209, 217, 220. 

 Utricularia cerato])liylLi, 2S8. 



coruuta, Micbx., 287, 289. 



fornicata, 289. 



gibba, 289. 



Integra, 289. 



juncea, Vahl, 2SS. 



lougeciliata, A. DC, 290. 



longirostris, 2S9. 



raaerorhiza, 288. 



persouata, 289. 



purpurea, Walt., 289, 290. 



setacca, 289. 



simplex, C. Wright, 290. 



striata, 289. 



subulata, L., 290. 

 var. clcistogama, 290. 

 Utricularia, notes on some American 

 species of, 287. 



Variable stars in 1884, observations 

 of, 393. 



Variable Stars, 396-403. 



Index to Designations, 404. 



Observations of Suspected Vari- 

 blcs, 406. 

 Veatehia, 290. 



Cedrosensis, 291. 

 Verbesina dissita, 299. 

 Vcsicaria Kingii, 353. 



montana, 353, 354. 



occidcntalis, 354. 



Wamerke sensitometcr, 159. 



