668 INDEX. 



Page. 



Smithsonian fnnd, condition of 5 



executive committee report on xix, xlviii 



Snell, Perez, collections by 420 



Sodium, quantity in ocean 249 



supply of, from rivers - 263 



Solar heat, dynamical theory of 238 



rays, chemical action of 620 



measureless energy in 620 



spectrum, absorption in 70 



Bunsen on 621 



system, history of : 397 



Solvent denudation of the ocean 285 



Sound, articulate, researches in 11 



atmospheric vibrations producing 200 



high pitch, researches in 124 



intensity of, researches in 10 



movement of - - - - 200, 201 



propagation and reflection of 10 



Sound-waves, movement of 96 



Specific gravity of gases, method of determining 613 



heat, of hydrogen 140 



of metals, measurement of ' 618 



heats, ratio of 9 



Spectra, spark, of rare earths 624 



Spectrometer, limit of iiieasurements of 214 



Spectroscopy, radiant-matter 151 



Spectrum, invisible rays 126 



researches in 145, 221 



solar, Bunsen on 621 



ultra-violet 153 



Spectrum analysis, discovery of principles of 622 



progress in 398 



Speech, transmission of 201 



Speed of vessels, progress in 569-590 



Sperry , J. L. , on Calaveras skull 459 



Spiritual beings, independent of gravitation 192 



forces, character of - 194 



Starks, Edwin Chapin, paper by 79 



Starry universe, knowledge of 212 



Stars, distances of nearest 217 



Stejneger, L., papers by 78, 79, 80 



Steam, superheating of 598 



Steamboats, pioneer 593 



Steam engine, century's progress of 591-603 



fuel composition of 599 



hmitsof , 600 



Steamers, cargo and passenger 572 



Steam navigation, progress in 567-590 



Steamship design, progress in 567 



Stearns, Robert E. C, papers by 78, 79 



photographs from - - 427, 456 



Steel steamships, progress in 589 



Steiner, Roland, collections from. 30 



