608 



INDEX. 



Temperature of the air, 105. 

 of the earth, 98. 



iuterual, 119. 

 of the Mediterranean Sea 

 near the coast of Algeria, 

 09. 

 of the sea, 66. -^ 



of the 8oil, 77. 



of various portions of the 

 sun, 13. 

 Temperatures, undergrouud, 69. 

 Tempered steel brushes, 51S. 

 Tenuant, Colonel, 11. 

 Robert, 124. 

 Tension of liquids, surface, 173. 

 Terrestrial electricity and solar spots, 122. 

 magnetism and aurora, 75. 

 physics and meteorology, 65. 

 refi'action, 6. 

 Tessie du Motay, 203. 

 Test for gold, a new, 205. 



for nitrates, 210. 

 Test-plate, Nobert's, 207. 

 Theorem in the equilibrium of forces, 2. 

 Theories of magnetism and light, 157. 

 Theory of Crookes' radiometer, 147. 

 of cyclones, mechanical, 101. 

 of evolution. Cope's, 276. 

 of galvanic resistance, new, 05. 

 of hail, 93. 



of the aberration of light, 8. 

 of the flow of water or gas, 141. 

 the lunar, 3S. 

 Therapeutical value of silphium, 525. 

 Therapeutics, 525. 



Thermal springs of the United States, 121. 

 Thermo-chemistry of ozone, 216. 



-electric battery of Clamond, 189. 

 propertiesof minerals, 219. 

 Thermometer, wet and dry bulb, 90. 

 Thomas, 209. 



Pack 398 

 Thompson, Dr. Wyville, 273, 342. 



Prof. A. H., 256. 

 Thomson, Prof. James, 70, 240. 

 Sir W., 135, 236, 266. 

 Thomson's dead-beat arrangement for 



chemical balances, 135. 

 Thorueycroft, 472. 

 Throckmorton, 401. 

 Thunder-storms, dry, 12S. 



in Europe, 129. 

 Thurston, Prof., 137. 

 Tides, effect of, on the rotation of the 



earth, 130. 

 Tilden,Dr.W. C.,371. 

 Timber, new process of injecting, 432. 

 Time, determination of local, 5. 



measure of, by hour-glasses, 04. 

 Time-signals, GO. 

 Tinning iron tacks, 514. 

 Tissaudier, 118, 132. 

 Tisserand, 14, 23, 425. 

 Todd, D. P., 32. 

 Tone of stringed instruments, increasing 



the, 145. 

 Torell Dr. 242. 



Torrey Botanical Club, 354, 370. 

 Tracing-paper, 4SG. 

 Transon, Abel, 545. 

 Trees at the Centennial, living, 356, 



time for cutting, 365. 

 Tresca, 138,191. 

 Tr6ve and Dnrassier, 202. 



Triassic fauna of Illinois, 300. 



Troost, 185. 



Troschel, Prof., 418. 



Trouvelot, 51. 



Trumbull, Dr. J. Hammond, 262, 370. 



Triitzschler-Falkeiistein, 457. 



Tschaugtschung, a Chinese monk, 10. 



Tarnbull, F. M., 336. 



Turnip taste In milk and butter, 383. 



Twilight, intensity of, 99. 



Tylor, 130. 



Tyndall and Bastian, 281. 



Typhoid fever, the blood in, 532. 



Tyrian-purple ink, 429. 



U. 



Uintah Mountains, silver and copper in, 



259. 

 Ultramarine, artificial, 489. 

 Umbrellas, water-proofing, 430. 

 Underground telegraph lines, 464. 



temperatures, 69. 

 Ungerer, 427. 

 Unio, new species of, 254. 

 United States, correction of assumed alti- 

 tudes, 233. 



Fish Commission, 402. 



thermal springs of, 121. 

 Uraniau and Neptunian systems, 34. 

 Uranus, the inner satellites of, 52. 

 Usher, R., 301. 

 Ute Agency, 252. 

 Utilization offish-bones, 372. 



Value of the dozen, 2. 



Van der Meusbrugghe, Prof., 142, ITO. 



Van der Willigen, 20. 



Van Houtte, Louis, 545. 



Van Patten, Dr., 310. 



Vau Tieghem, 353. 



Vanadic acid in magnetic iron, 198. 



Vanadium minerals, new, 222. 



Vapor of water in the air, 105. 



Variations in plants with altitude, 301. 



Varnish for blackboards, 495. 



for negatives, 483. 

 Vasey, Dr. George, 355. 

 Vegetable substances, reraovingfrom wool, 



502. 

 Vegetables and animals, origin of the 

 sexes, in, 280. 

 cooking of, 426. 

 Venus, atmosphere of, 27, 29. 

 Venus's flower-basket, 340. 

 Verkriizen,296. 

 Verrill, Prof., 338. 

 Vertebrates, embryological data of, 296. 



parthenogenesis in, 275. 

 Vertical movement of vessels under high 



speed, 472. 

 Vibration of fluid columns, 140. 

 Victoria, mineral statistics of the colony 



of, 220. 

 Viedt,4S5,495,520. 

 Vienna, Geographical Society of, 366. 



Observatory, 57. 

 Vignolles, Charles B., 545. 

 Villarceau, S, 37. 

 Villeneuve, 112, 450. 

 Vinard, 309. 



Vision, limits of, 273, 274. 

 Vlacq, 81. 

 Vogel, Dr. H. C, 15, 53, 154, 155. 



