312 



INDEX 



Russell, H. N., 305 



Rutherford, Sir E., 2, 5, 9, 164, 

 168, 1735 175) 182, 191, 192, 

 194, 200, 202, 206, 240, 248, 

 286 ; portrait of, 164 



Rydberg, 248 



Salt Solutions, 69, 71, 73» 



105, 109 

 Saturation current, 128 

 Saturn's rings, 277, 296 

 Schultze, 117 

 Searle, G. F. C, 236 

 Sea-water, freezing of, 73 

 Secchi, Father, 303 

 Semi-permeable membranes, 95 

 Sidgreaves, Father, 291 

 Silver, 75 

 Sirius, 288 

 Sobral, 258 

 Soddy, F., 156, 176, 182, 191, 



196 

 Sodium, 202 

 Soil, the, 123 

 Solar radiation, 273 

 Solar system, 289, 301 

 Solid solutions, 80, 83, 87 

 Solution, problems of, 8, 93 et 



seq. 

 Sommerfeld, 250 

 Sorbite, 89 

 Sorby, 89 



Space and time, 3, 17, 21 

 Space-time, 254, 259 

 Specific heats, 246 

 Spectro helioscope, 281 

 Spectroscope, 262 et seq.^ 277 et 



seq. 

 Speculum metal, 91 

 Star clusters, 289 

 Stars, classification of, 302 ; 



distance of, 287, 290 ; giant 



and dwarf, 305 ; magnitude 



of, 302, 304 ; number of, 



290 ; spectra of, 303 ; tem- 

 perature of, 304 \ temporary, 



291 et seq. ; variable, 289 

 Stead, J. E. 88, 89 



Steel, B. D., 1 10 



Stellar system, 290, 299 



Stokes, Sir G. G., 134, 151, 263 



Stoney, J., 4, 234 



Strutt, Hon. R. J., see Lord 



Rayleigh 

 Sugar solutions, 96, 98, 105 

 Sun spots, 273, 282 

 Sun, age of, 285 ; energy of, 



284, 297 ; temperature of, 



284, 297 

 Surface tension, 91, 92, 121, 



123, 207 



Telegraphy, 158, 224 

 Telephony, 158, 224 

 Telescope, 262 

 Temperature of space, 298 

 Thermionic valve, 225 

 Thermodynamics, i, 2, 5, 25, 80, 



98, 102 et seq.j 206 

 Thermos flask, 54 

 Thomson, Sir J. J., i, 3, 65, 125, 



I3i> i33j 134, 142, 143) 146 

 et seq.^ 153 ^^ seq.^ 21^ et 

 seq., 229, 231, 234, 283 

 Thorium and Thorium-A', 182, 



183 

 Thought-transference, 34 



Tin, 82 



Townsend J. S., 129, 134, 146 



Tubes of force, 152, 153, 160, 



12'] et seq. 



Tycho-Brahe, 291 



Undulatory theory of 

 light, 221 



I 



i 



