546 



GENERAL INDEX. 



[50 



Transfer-resistance in voltaic cells, xxx. 



238. 

 Transit circle, collimation constant of. 

 S:haeberle, v. 144. 



of Yenus, iv, 236 ; v. 84. 



observations at Allegheny Obser- 

 vatory^. 85 ; Lick Observatory, v. 131: 

 Princeton, Young, v, 321 ; Vanderbilt 

 Univ.. v, 428; Washburn Obs.. v, 71. 

 Transits of Mercury, Neiocomb, v, 317. 

 Trimen, H., Catalogue of plants of Cey- 

 lon, xxx, 321. 

 Trowbridge, J., physical notices, i. 74, 

 139. 236, 323, 401; ii, 74. 147, 219, 

 316, 396, 484; iii, 49,' 147, 239, 320, 

 413,486; iv, 61.' 144, 286, 392; v, 

 76. 148, 229, 308, 469; vi, 67, 145, 

 *!9, 406, 476; vii, 57, 143, 236, 485; 

 viii, 70, 150, 223, 390, 456; ix, 59, 

 167, 255, 334, 402, 494. 

 effect of cold on magnetism, i, 316. 

 the Thomson effect, iv, 379. 

 heat produced by reversals of mag- 

 netization, vii, 58. 



physical papers read before the 

 American Association, viii, 307. 



measurement of strong electrical 

 currents, ix, 236. 



elasticity of ice, ix, 349. 

 application of photography to elec- 

 trical measurements, ix, 374. 

 alternating currents, ix, 377. 

 irregularities in the action of gal- 

 vanic batteries, xxx, 34. 



a standard of light, xxx, 128. 

 Irumbull, J. H., DeCandolle's Origin of 

 Cultivated Plants, v, 241, 370 ; vi, 

 128. 

 Tryon, G. W., Structural and Systematic 



Conchology, v, 397. 

 Tschermak, G., Lehrbuch der Mineral- 

 ogie, iii, 68; iv, 232 ; vii, 75; ix, 420. 

 Tucker, J. H., Sugar Analysis, ii, 398. 

 Tuckerman, E., N. American Lichens, 



iii, 326. 

 Tuning forks, autographic records of 

 vibratious of, Compton, vii, 444. 

 experiments on, Wead, vi, 177. 496. 

 measurements of vibrations of. xxx, 

 485. 



rate of, Michelson, v, 61. 

 Turmeric, chemistry of, vi, 141. 

 Turner, W., Names of Herbes, iii, 326. 

 Tyndall, J., on fog-signals, iv, 470. 



TJ 



Underwood, L. M., Our Native Ferns 

 and their Allies, iv, 156. 



Catalogue of North American Hepa- 

 ticae, viii, 403. 



Units, electrical, see Electrical unite and 



Ohm. 

 University of Virginia, laboratory notes 



from, v, 159. 

 Upham, W., Lake Agassiz. v, 156; vi, 

 327. 



Minnesota valley in the ice age, vii, 

 34, 104. 



Minnesota Geological Reports, iii, 

 62; v. 156; viii, 155, 316; xxx, 397. 

 Flora of Minnesota, viii, 472. 

 Upton, W., Caroline Island Eclipse Ex- 

 pedition, viii, 477. 

 Urea, derivatives of, ix, 255. 



transformation of, iv, 60, 227. 

 Utah, earthquakes in,. Gilbert, vii, 49. 

 iron ores of Southern, i, 80. 

 Lake Bonneville", vi, 150. 

 onofrite from, i, 312. 

 realgar and orpiment in, i, 219. 

 sulphur deposits, v, 158. 

 tiemannite, ix, 449. 

 volcanic rocks of. vii. 453. 



Vacua, experiments on high, Rood, ii, 90. 

 Vacuum, electrical resistance of, iii, 149. 

 487. 



regulator, vii, 406. 

 Vanadium sulphides, i, 137. 

 Vanhise, G. H., enlargements of feldspar 

 grains, vii, 399. 



hornblende fragments, xxx, 

 231. 

 Van Tieghem. Ph., Traite de Botanique, 



vii, 322. 

 Vapor, condensation of, as a source of 

 electricity, vii, 144. 



densities, Worcester, vi, 144. 



determination of, viii, 390. 

 of the halogens, iii, 143. 

 density apparatus, vi, 237. 

 pressures, new method of determin- 

 ing, ix, 252. 

 Variation, causes of, Hitchcock, viii, 49. 



tendency in, vii, 326. 

 Varieties, gender of names of, Gray, vii, 



396. 

 Vasey, G., Grasses of the United States, 

 vi, 322. 



Agricultural Grasses, viii, 403. 

 Vassar Brothers Institute, Transactions 



of, ix, 268. 

 Vegetables, see Botany. 

 Vein, see Geology. 

 Veitch, J., Manual of the Coniferse, iii, 



69. 

 Vennor, H. G., apatite of the Canadian 



rocks, viii, 74. 

 Venus, see Transit. 



