670 INDEX. 



Page. 



Thermal history of the earth 243 



Thomas, Cyrus, researches by 41 



Thompson, Silvanus P. , researches by 146, 147 



Thomson, Elihu, on electrical advance 76 



on field of experimental research 119- 130 



Thomson, James, on volcanic rocks 627 



Thomson, J. J. , on cathode rays 76 



researches by 147, 148 



Thorium rays, discovery of 150 



Thorney croft, Mr. , torpedo vessels introduced by 578 



Thought transference, Crookes on : 186 



transmission, possibility of 203 



Thurston, R. H., on century's progress of steam engine 591-603 



Tidal forces, investigation of 229 



friction, discussion of 236 



Tides, the, George Darwin on 235, 236 



Time, measurements of 218, 219 



Tobacco, imported into Europe 411 



Todd, Commander, animals collected by 22, 56 



Toledo Exposition, appropriation for lviii, 19 



Topaz crystals in museum 79 



Torpedo-boat engines 594 



Torpedo vessels, improvements in 578 



Torricelli, researches by .• 116 



Totem, import of the 77 



To wnsend, C. H. , on the mammoth 357 



Trans- Atlantic steamers, progress in 568 



Transportation, development of 395 



steam, progress in 567 



Travers, Doctor, discoveries by 144 



Trelease, William, on botanical opportunity 77 



Tribes of the Philippines 514, 527-547 



Trouessart, Doctor, cited 366 



Trowbridge, Professor, researches by 127, 147 



True, Frederick W. , account of Museum by 78 



exposition representative ... 19 



paper by 79 



report on Omaha Exposition by 82-87 



Tuckey, Lloyd, researches by 187 



Tukeyman, H. , on the mammoth 353 



TurJiinia, speed of the 581 



Turbo-motor, steam 581 



Turner, H. W. , on Calaveras skull 459 



U. 



Ultra-violet rays, investigation of 152 



Uniformitarianism, principles of 247 



Unity of American peoples, Putnam on 473 



of human species 77 



of nature. Rice on 398 



Universe, progress in study of 396 



Uranium, rays of , , , 149, 155-162 



