49] 



VOLUMES XXI-XXX. 



545 



Sun, spectroscopic notes on, Young, vi, 



333. 



structure of, iv, 311. 

 Sun-glows, vii, 144; Hazen, vii, 201. 

 Sunlight, at high altitudes, iv, 393. 

 Sun-spot areas and temperature ranges, 



vii, 57; ix, 76. 



and magnetic declination, i, 238. 

 see also Spectrum. 

 Swan incandescent lamp, radiation of, 



viii, 225. 

 Swift's comet (a) 1881, i, 509. 

 Swiss Seismological Commission, hi, 337. 

 Symons, T. W., on the Upper Columbia, 

 ■ v, 240. 

 Syria, prehistoric man in. viii. 158. 



Tables, Physical and Meteorological, 



Guyol, ix, 258. 

 Tahoe, see Lake Tahoe. 

 Tait, P. a., Heat, noticed, vii, 488. 

 Light, noticed, viii, 310. 

 Properties of Matter, m, 241. 

 Tardy, red diluvium of Europe, i, 155. 

 Tasimeter, Edison's, iv, 43, 433. 

 Taxidermy, Manual of, Maynard, vi, 158. 

 Taylor, W. B., crumpling of the earth's 



crust, xxx, 249, 316. 

 Telegraphy without a cable, iv, 392. 

 Telescopes used as night-glasses, Holden, 



ii, 129. 

 Tellurium and selenium, method of sep- 

 arating, xxx, 156. 

 oxide, new, vi, 237, 

 reactions of, vi, 402. 

 salts of, ix, 400. 

 Temperature, change of, from mechanical 

 strains, hi, 321. 

 diurnal variation of, Gould, hi, 99. 

 regulator of, vii, 406. 

 relative, of the hemispheres, Ferrel, 

 iv, 89. 



variations in length of bars from, 

 Woodward, v, 448. 



of a zinc bar, Comstock, ii, 26. 

 Temperatures, measurement of low, ix, 

 495. 



production of low, viii, 224. 

 underground, xxx, 397. 

 Tennessee, age of Appalachians in, El- 

 liott, v, 282. 

 Terminology, geological, i, 326. 

 Texas, Brazos coal-field, ii, 152. 



copper-bearing region of, iii, 65. 

 meteoric iron, Mallett, viii, 285. 

 Paleozoic rocks of central, Walcott, 

 Viii, 431. 

 Thallium-papers, meteorological use of, 

 i. 66. 



Thermal springs, see Geology. 

 Thermometer, differential resistance, 

 Mendenhall, xxx, 114. 



exposure, Hazen, vii, 365. 

 wet-bulb, Hazen, xxx, 435. 

 Thermometers, study of, Sherman, ix, 

 385 ; xxx, 42. 



calibration of, i, 373 ; iii, 278 ; iv, 63. 

 Geissler, i, 449, 451. 

 Thermometry, Waldo, i, 57, 226, 443. 

 Thiesen, Geissler thermometers, i, 449. 



on calibrating thermometers, iv, 63. 



Thomas, B. W., microscopic organisms 



in bowlder clays of Chicago, viii, 317. 



Thome, 0. W., Text-book of Botany, xxx. 



164. 

 Thompson, S. P., resistance of carbon, 

 iv, 433. 



Lessons in Electricity and Magne- 

 tism, iii, 241 ; vii, 320. 

 Thomsen's thermochemical investiga- 

 tions, i, 87. 

 Thomson effect, see Electricity. 

 Thomson, J., Alveolites, Amplexus and 

 Zaphrentis, Scotland, ii, 235. 



New Family of Rugose Corals, iv, 

 400. 



Corals of the Carboniferous of Scot- 

 land, viii, 316. 

 Thomson, W, on the tides, iv, 316. 

 Presidential address, viii, 302. 

 Lectures on Molecular Dynamics, 

 viii, 480. 

 Thorium, atomic weight of, v, 146. 



metallic, v, 146. 

 Thunder Storms, ix, 498. 

 Thurston, R. H., Materials of Engineer- 

 ing, viii, 405. 

 Tidal friction, G. H Darwin, i, 402. 

 Tide-predicting machine, ix, 47. 

 Tides in early geological time, iii, 323. 

 in rivers, work by Comoy on, viii, 

 228. 



in the sea and the earth, iv, 316. 

 Tietjen, Astronomiscb.es Jahrbuch,iv, 235. 

 Timber-line, Gannett, iii, 275. 

 Time, conference for the adoption of a 

 standard, v, 231. 



signals, distribution of, i, 414. 

 Titanium, atomic weight of, ix, 334. 

 Todd, D. P., solar parallax, i, 491. 



transit observations at the Lick 

 Observatory, v, 131. 

 Toluene, action of amyl-chlorides on, 



viii, 455. 

 Tones, harmonic and partial, iii, 147. 

 Tornadoes, Hazen, viii, 181. 



and waterspouts, Ferrel, ii, 33. 

 Tourmaline, conductivity of, for heat, 

 viii, 456. 



see also under Minerals. 



