PHYSIOLOGICAL PHYSICS. 



Resistance box, 136 



External, 26 



Internal, 26 



Measurement of, 138 



of fluids, 136 



Secondary, 113 



Unit of, 33 



Resolution of forces, 492 

 Resonance, 441 

 Resonator, 442 



, Forms of, 443 



, Helmholtz', 444 



Re&ultant force, 490 



pressure, 192 



tone, 433 . 



Betinnl image, Size of, 381 



Rheocord, 77 



Rheophores, 149 



Rheostat of Wheatstone, 135 



Rheotrope, 59 



Ritter, 87, 335 



Rock salt, 462 



Rotation of plane of polarisation, 



410 



Round compensator, 124 

 Ruhmkorff's coil, 39 

 Rumford, 451, 460 



Saccharimeter, 413 



, Soleil'e, 415 



, Use of in medicine, 415 



Salimeter, 2034 

 Saturation of colour, 344 



point of liquid, 248 



Scheiner's experiment, 384 

 Schmidt's experiments on nitra- 

 tion, 267 

 Scheele, 335 



Schweigger's multiplier, 96 

 Secondary axis, 303, 313 



circxiit, 35 



colours, 342 



contraction, 72 



- resistance, 113 

 Seebeck, 142, 335 

 Selligues, 359 

 Seyler, Hoppe, 326 

 Short circuit, 48, 56 

 Shunt for galvanometer, 103 

 Siemens' unit of resistance, 33 

 Signal, Electric, 172 

 Silbermann, 455, 479 



Siren of Cagniard de la Tour, 42 I 



- of Dove, 428 



, Double, of Helmholtz, 427 

 Sitting, Dynamics of, 511 

 Sledge inductor, 43 

 Smee's element, 21 

 Suelleu's types, 383 



Soleil's quartz plate, 414 



saccbarimeter, 415 



Solubility, Coefficient of, for gas, 



291 



Sorby's cell for spectroscope, 331 

 Sound, Analysis of, 446 



, Intensity of, 423 



, Interference of, 429 



, Musical, 423 



, Nature of, 417 



, Pitch of musical, 423 



, Quality of musical, 



, Rarefaction of, 418 



, Reflection of, 421 



, Refraction of, 421 

 , Transmission of by tubes, 



421 



, Vowel, 450 



, Wave of condensation of, 418 



, of rarefaction of, 418 



Spamer's medical induction appa- 

 ratus, 154 

 Specific gravity, 197 



of auiinal fluids, 208 



heat, 476 



Spectroscope, 323 



for direct vision, 330 



- in physiology, 326 

 Spectrum, 319 

 - analysis, 323 



, Dark lines of, 321 



, Effects of, 334 



, Theory of, 320 

 Speed of blood stream, 320 

 Spherical aberration of the eye, 



394 



of lenses, 347 



mirrors, 302 



, Foci of, 303 et set], 



, Formation of images in, 



306 



, Reflection by, 303 et seq. 



Spheroidal state, 475 

 Sphygmograph, 233 

 Sphygmophone, 235 

 Spbygmoscope, 2:34 

 Spreug 1's air pump, 2S2 

 Stable equilibrium, 501 

 Stage micrometer, 366. 3(58 

 Standard of length, 485 



of weight, 486 



Standing, Dynamics of, 570 

 Stethoscopes, 422 



, Konig's, 422 



Stimulation of muscle, 67 



, Latent period of, 177 



of nerve, 62 



, Mechanical, 73 



tube, 61 



