INDEX. 663 



Page. 



Nelson, E. W., collections })y 30 



Neon, discovery of 144 



Nerve coherers, Crookes on 186 



phenomena, researches in 335 



Nervous system, problem of 170 



relation of muscular action to 346 



Newberry, J. S. , on petrified forests 300 



Newcomb, Simon, on aspects of American astronomy - 76 



Newton, Sir Isaac, optical researches by 96 



Nordenskiold, Baron, on mammoth ivory 364 



Nutting, Charles Cleveland, paper l)y 79 



0. 



Oberholser, Harry C. , paper by 79 



Obsidian implements from California 444, 451 



Ocean, contour lines of depth of 312 



density of, in Southern Hemisphere 326 



depths of, exploration of 309 



floor of, present condition of 309-328 



marine deposits on floor of 315 



mass of 288 



navigati(jn of, progress in 569-590 



origin of 232 



original condition of 254 



primeval, composition of 248 



solvent denudation of 285 



temperature of floor of 313 



total area of 252 



Ocean-liners, progress in 567 



Oceanic area, estimate of 287 



evolution of ^ 319 



research, progress of 324 



Oelrichs & Co. , courtesies from 50 



Ohio Centennial Exposition, appropriation for lviii 



Olszewski, researches by 131 



Omaha Exposition, appropriation for 19 



exhibit at 35, 37 



finances of 87 



report on S2-87 



Omaha tribe, study of 77 



Optical nerve, function of 376 



Optics, Newton's researches in 97 



progress in science of 95 



Organit- evolution from botanical standpoint 77 



nature, photochemical action in 620 



Orientalists, congress of, delegates to 17 



Origin of species, theory of 400 



Osgood, II. L. , on American colonial history 80 



Oxygen, liquid, Dewar on 11 



P. 



Palmer, Edward, collections by 30 



Palmer, William, collections by 29 



