GENERAL INDEX TO THE FIVE VOLUMES. 



509 



Solitary glands of the intestine, . ii. 319 

 Sommemng, yellow spot of,. . . .v. 55 



Soprano voice, iii. 504 



Sound, physics of, .v. 166 



laws of vibrations of, v. 169 



vibrations of, in vacua,.. . .v. 169 



intensity of, v. 170 



reflection and refraction of,.v. 171 



as distinguished from noise, 



v. 171 



pitch of, v. 173 



range of vibrations of, in mu- 

 sic, v. 174 



quality of, v. 179 



harmonics, or overtones,, .v. 182 



two sounds producing silence, 



v. 190 



Soup, formula for making, ii. 87 



Special senses, general characters 



of, v. 12 



Speech, mechanism of, iii. 513 



action of the tongue in,, .iii. 515 



Spermatic cord, v. 314 



Spermatozoids, v. 325 



intermediate segment of,, .v. 326 



influence of reagents, cold, 



etc., upon the movements of, .v. 326 



development of, v. 328 



mechanism of the penetration 



of, into the uterus, v. 337 



course of, through the female 



generative passages, v. 341 



passage of, through the vitel- 



line membrane, v. 352 



passage of, through a delicate 



animal membrane, v. 353 



number of, necessary for fe- 

 cundation, . . . v. 353 



Spheno-palatine ganglion, iv. 419 



Spherical aberration, v. 8.0 



partial correction of, by the 



iris, v. 81 



correction of, in compound 



lenses, v. 82 



Sphincter of the rectum, internal, 



ii. 389 



external, ii. 390 



of O'Beirne, ii. 407 



Sphygmograph of Marey, i. 255 



of Vierordt,. i. 256 



Spina bifida, v. 395 



Spinal accessory nerve, iv. 166 



physiological anatomy of, .iv. 167 



properties and functions of, 



iv. 169 



Spinal accessory nerve, functions 

 of the internal branch of, iv. 170 



influence of, upon phonation, 



iv. 171 



extirpation of, in animals, 



iv. 172 



influence of, upon deglutition, 



iv. 175 



influence of, upon the heart, 



iv. 176 



functions of the external 



branch of, iv. 177 



Spinal cord, regeneration of, after 

 partial exsection,.. iv. 65 



physiological anatomy of, . iv. 264 



tilum terminale of, iv. 265 



columns of, iv. 266 



proportion of white to gray 



substance in, iv. 266 



central canal of,. . .iv. 266, v. 398 



cornua of the gray substance 



of, iv. 267 



direction of the fibres of,.iv. 268 



general properties of,. . . .iv. 273 



effects of galvanization of the 



antero-lateral columns of, iv. 274, 276 



effects of galvanization of 



the posterior columns of, iv. 275, 276 



inexcitability and insensibil- 

 ity of the gray substance of, 



iv. 277, 278 



excitability and insensibility 



of the antero-lateral columns of, 



iv. 278 



limits of the sensibility of the 



posterior columns of, iv. 278 



action of, as a conductor, .iv. 279 



transmission of motor stimu- 

 lus by, iv. 280 



^situation of the motor con- 

 ductors in different regions of, 



iv. 281 



functions of the lateral col- 

 umns of, iv. 282 



decussation of the motor 



conductors of, in the medulla 

 oblongata, iv. 283 



decussation of the motor con- 

 ductors of, in the cervical region, 



iv. 283 



transmission of sensory im- 

 pressions in, iv. 285 



probable functions of the pos- 

 terior white columns of, in mus- 

 cular coordination, iv. 289 



