TOXODON-TUCKER 



GENERAL INDEX 



Toxodon, structure of the posterior 



foot of, 19, 402. 

 Trade, is tliere rcciprocit\- in ?, aud 



the consumption of manufactured 



commodities, 23, 526. 



— tokens, circulating during the War 

 of the Rebellion, 9, 242. 



Trades monsoon area, enquiry into 



the pressure and rainfall conditions 



of the, 44, 159. 

 Transformation of the series S = 



ax -|-bx" +cx", &c.. 3, 138. 

 Transit, Heller and Brightly's new, 



12, 115. 



— instrument, method of replacing 

 cross hairs in telescope of, 3, 102. 



— level, new, 10, 288. 

 Transitive Substitution Groups that 



are simply isomorphic to the Sym- 

 metric or the Alternating Group 

 of Degree Six, 36, 2aS. 



Transportation in the United States, 

 46, 171. 



Trap at Williamson's Point, 18, 96. 



— dyke, across southeastern Pennsyl- 

 vania, 22, 438. 



— dykes in the Arclijean Rocks of 

 southeastern Pennsylvania, 21, 691. 



Traps of the Mesozoic Sandstone in 

 York and Adams Counties,. 14, 

 402. 



— on the Mesozoic red Sandstone of 

 Pa. and Connecticut, microscopical 

 sections of, 14, 430, 431. 



Travis, Charles, pyritc from Corn- 

 wall, Pennsylvania, 45, 131. 

 Treasury note, Turkish, 6, 214. 

 Trees, fruit, revival of, 12, 3. 



— for the Park, circular relative to, 

 16, 340. 



Trego, C. B., Disc of Theodosius, 5, 



125. 

 Indian Walk of 1737, 5, 127. 



— • — obituary notice of, 14, 356.- 

 , of Don Lucas Alaman, 5, 



336. 

 seventeen-year locusts, 5, 209. 



Trelease. William, desert group No- 

 line;e, 50, 405. 



— • — -species in Agave, 49, 231. 



Trial by jury, 9, 209. 



Triangles, (prime) right-angled, and 

 V2, 9, 415. 



Trias, important Ijoring through 

 2000 feet of, in eastern Pennsyl- 

 vania, 29, 20. 



— of North America, vertebrata of, 

 24, 209. 



Triassic Mammals, Dromatherium 

 and Microconodon, 24, 109. 



— plants of North Carolina found in 

 Pennsylvania, 19, 16. 



— Saurians in Pennsylvania, 17, 231. 

 Tribal names, Indian, 23, 294. 

 Trigeminus nerve, in the cat, 23, 



459- 

 Trigonometry, analytical, 3, 49. 

 Trionychidse, existing genera of the, 



42, 268. 

 Trippel, Alexander, Schintz's gas 



generator, 10, 9. 

 Troops, mo\'ements of, in cities in 



cases of riot or insurrection, 18, 



89. 

 Trowbridge, Augustus, ether drift, 



49, 52. 



Trowliridge, r)a\id, atmosphere of 

 the Sun and planets, 16, Z-1 ■ 



Trowbridge, John, spectra of gases 

 at high temperatures, 41, 138. 



Troyon, I'^'ed, Merovingian grave- 

 yard, 10, 3. 



True, Frederick W., classilication of 

 the Cctacr;i, 47, ,-^85. 



Trumbull, I kiiry Clay, obituary no- 

 tice of, 42, viii. 



Truss, bridge, depth and stiffness, 



44. 164- 



Trusts, problem of, 42, 15. 



Tuberculosis in animals, ^Zi i53- 



— -warfare against, 42, 212. 



Tucker, George, effect of gold mines 

 of California upon the value of 

 the precious metals, 5, 148. 



