656 



INDEX. 



Sounds of heart, ii. 344 ; vocal, how 

 modified, 245 



Spallanzani, experiments on saliva, ii. 

 185 ; on digestion, 198 ; on the 

 movements of the stomach, 196 . 



Specific gravity of bile, ii. 253, blood, 

 296 ; milk, 628 j urine, 497 



Spectrum solar, ii. 45 



Speech, ii. 445 



Spengler, on the pressure of the 

 blood in different arteries, ii. 362 



Spermatozoa, in seminal tubules, ii. 

 545 ; movements of, 547 ; their mo- 

 tions analogous to the ciliary, i. 66 



Sperm-cell, ii. 526 



Spheno-palatine foramen, ii. 10 



Spherical aberration, ii. 45 ; prevented 

 by iris, 49 



Sphincter vesicse, ii. 506 



Sphincters, action of, i. 191, 336 



Spinal accessory nerve, ii. 127 



Spinal column, i. 140 ; development 

 of, ii. 596 



Spinal cord, ii. 226 ; antero-lateral 

 columns of, 317 ; descriptive ana- 

 tomy, 255 ; minute anatomy, 258 ; 

 course of fibres, 260; functions, 

 307, 316; its share in mental and 

 physical nervous actions, 307, 339 ; 

 polar state of, 314 ; mechanism of 

 its actions, 321 ; effect of injury 

 below the phrenics, 342; lumbar 

 region of, 320 ; functions of, in ver- 

 tebral animals, 31 1 ; hypothesis, to 

 explain the action of, 322, of Dr. 

 Marshall Hall, Whytt, Prochaska, 

 322 ; effects of mental emotions on 

 actions, 324 



Spinal nerves, their double roots, i. 

 300 ; their functions, 306 



Spiral duct of sweat gland, use of, i. 424 



Spirometer, ii. 404 



Spleen, ii. 508, 608 ; the seat of des- 

 truction of blood corpuscles, 307 j 

 uses of, 506 ; pulp, 510 



Spongy portion of urethra, ii. 544 



Spore, or sporangium, ii. 527 



Squalus cornubicus, testicle of, ii. 454 



Squirrel, spermatozoa of, ii. 547 



Stammering, ii.445 



Starch, digestion of, ii. 208, 243 ; its 

 conversion into dextrine by pan- 

 creatic fluid, ii. 242 ; sugar, cellu- 

 lose, etc., as calorifacient food, 426 



Stanuius, on pancreas of fishes, ii. 

 246 



Stapes, ii. 70 



Stark, Dr., effects of a diet without 

 azotized food, ii. 156 



Stearine, i. 43, 82 



Steinstrup, on the alternation of ge- 

 nerations, ii. 528 



Stentor, multiplication of,ii. 531 



Stereoscope, ii. 61 



Stephens, on digestion, ii. 198 



Stilling, on the fibres of the optic 

 thalami, ii. 349 ; and Wallach, on 

 the roots of the nerves, 302 ; on 

 the spinal cord, 258, 367 



Stimuli, to muscle, i. 172 ; all act on 

 the muscular tissue itself, 1 74 ; to 

 nerves, 173, 234 ; a double stimulus 

 necessary to many nervous actions, 

 333 



Stomach, ii. 190 ; vermicular contrac- 

 tions of, caused by irritation of the 

 vagi, 124; its parts in vomiting, 

 213 ; movements of, 196 



Stone in the bladder, sympathetic 

 sensations produced by, i. 388 



Straight portion of uriniferous tube, 

 ii. 490 



Strecker, on the composition of the 

 bile, ii. 256 



Striped muscular fibre of the heart, 

 ii. 339 



Strobila, multiplication of, ii. 528 



Strychnine, its action on the cord, i. 

 314 



Subjective phenomena, of hearing, ii. 

 100 ; of smell, 13 ; of taste, i. 448 



Submaxillary glands, ii. 182 



Submucous tissue, ii. 222 



Succus gastricus, ii. 200 



Suction-power of auricles, ii. 379 



Sugar, in blood, ii. 296 ; formed in the 

 liver, 261 ; formed from starch, 

 243 ; effects of feeding dogs on, 155 



Sulphates in urine, ii. 503 



Sulphocyanides in saliva, ii. 184 



Sulphuretted hydrogen in intestines, 

 ii.268 



Superior cava, ii. 334 



Superior longitudinal commissure, i. 

 286 



Supra-renal capsules, ii. 517 ; deve- 

 lopment of, 610 



Supra-orbitar convolution, i. 282 



Sweat glands, i. 422 



Sylvius, aqueduct of, i. 289 



Sympathetic, ii. 131 ; cervical ganglia 

 of, 136 ; lumbar and sacral por- 

 tions of, 138 ; cervical portion of, 

 135 ; endowment of fibres of, 143 ; 

 effect of section of, on animal heat, 

 ii. 429 ; effects of division of trunk of, 

 146 ; function of, 141 ; sensations,!. 

 388 



