INDEX. 



749 



The Numbers refer to the Paragraphs. 



ber of, 76.2, 763; share of lungs and air- 

 passages in, 759, 760; various influences 

 affecting, 763 



Respiratory Circulation, 710 ; peculiarity of, 

 746 



Respiratory pulse, 744 6 



Restiform bodies, 350 354 



Rete mucosum, 161 



Retina, structure of, 539 ; the recipient of 

 visual impressions, 536; inversion of pic- 

 tures upon, 543; persistence of impressions 

 on, 551, 552 ; vanishing of images on, 554 ; 

 visual representation of, 555 



Retinacula, 906, 912 



Rigor Mortis, 232, 595597 



Ritchie, Dr., his researches on development 

 of ova, 907 ; on Menstruation, 909 ; on the 

 Corpus luteum, 914 



Robinson, Mr., on effusion of fibrine, 803 



S. 



SACCHARINE principles of food, 640 ; destina- 

 tion of, 641, 643, 645, 670 



Saliva, properties of, 656, 668, 863 ; incorpo- 

 ration of with food, 656 



Salivary glands, structure of, 862 ; secretion 

 of, 863 ; influence of nervous system on, 

 625, 626 



Saunders, Mr. E., his researches upon the 

 teeth, 217 k-m 



Savart, M., his researches upon sound, 469 a 



Scharling, Prof., his researches on respiration 

 767 



Schleiden, his researches on the development 

 of cells in Plants, 124 



Schwann, his experiments on muscular con- 

 traction, 592 ; his observations on cellular 

 origin of Animal structures, 135 



Seasons, influence of on Calorification, 894 



Sebaceous glands, 872 



SECRETION, general nature of, 275278, 817 ; 

 structures adapted for, 821 823 ; essen- 

 tially composed of cells, 821 823 ; disor- 

 ders of, connected with nutritive processes, 

 882 ; not dependent on nervous agency, 620, 

 624 ; influence of nervous system on, 625 

 628 



Secretions, amount of, 818; sources of, 819 

 elements of, pre-existing in the blood, 820 

 some of them used in the system, 820 ; see 

 Bile, Urine, Milk, &c. 



Seguin, on cutaneous exhalation, 870 

 Selecting power, of individual parts, 782 785 

 Semicircular canals, 366 

 Seminal secretion, 867, 901, 904; influencec 



by state of feeling, 626 note 

 SENSATION, 307, 308 ; characteristic of Ani 

 mals, 283, 284; why associated with reflea 

 actions, 371, 372; dependent on Capillarj 

 Circulation, 290, 507, 508 ; the originator o 

 consensual movements, 430 432; the guide 

 of voluntary movements, 433 

 Sensations, nature of, 506 ; different kinds of, 



507 ; dependence of on supply of blood, 



508 ; pain or pleasure connected with, 509 ; 

 influence of habit on, 510 513 ; special, 



514, 518 ; common, 514, 515 ; subjective 

 and objective, 516, 518, 521 ; transference 

 of, 517 ; influence of attention on, 519 521 ; 

 knowledge gained from, 487 490 

 Sense, Muscular, 433, 434 

 Sensibility in different parts, 507, 508 

 Sensitive Plant, movements of, 1 

 Sensorium, 435 



ensory ganglia, 422 427 ; functions of, 428 

 440 



nerves, 441 449 ; terminations of, 248 



tract of Sir C. Bell, 351 



Serous membranes, 175 



Serpents, 29 



Serres, his measurements of Cerebellum, 457 ; 



of Cerebrum, 481 

 Serum of blood, 696; composition of, 697; 



proportion of, to clot, 703; milky, 697 e 

 Seventh pair, portio mollis of, 446 ; portio 



dura of, 406 

 Sexual instinct, 903, 909 ; its supposed loca- 

 tion in the Cerebellum, 466 470 

 Sharpey, Dr., his observations on development 

 of bone, 197 201 ; on muscular fibrillae, 

 230, note ; on nerves of Cuttlefish, 322; on 

 decidua, 919 

 Shell, structure of, in Echinodermata, 192 ; in 



Mollusca, 192 

 Siege of Landau, 946 

 Sighing, act of, 380 

 Sight, sense of, see Vision 

 Simon, Mr., on Thymus and Thyroid Glands, 



687, 688 



Single vision with two eyes, 545 547 

 Siren, 32 ; blood-corpuscles of, 145 note 

 Sixth pair of nerves, 405 

 Size, mode of estimating by vision, 549 

 Skin, structure of, 176, 177 ; contractility of, 

 234 ; absorbing power of, 676 679 ; respi- 

 ratory power of, 768 ; exhaling apparatus 

 in, S6S ; transpiration from, 869871 ; seba- 

 ceous and ceruminous glands in, 872 ; exu- 

 dation from, increased by heat, 897 

 Skull, forms of, in different races of Men, 83 



87 



Sleep, 499 



Smell, sense of, 531, 532 ; seat of, 531 ; con- 

 ditions of, 531; acuteness of, in some Ani- 

 mals and Men, 532 

 Sneezing, act of, 381, 531 

 Sobbing, act of, 380 

 Solen, nervous system of, 317, 318 

 Somatic death, 813, 814 

 Somnambulism, 500, Appendix II. 

 Sound, laws of propagation of, 560 562; suc- 

 cessive pulses of, 569 ; mode of estimating 

 direction, distance, and intensity of, 570 ; 

 rapidity of perception of, compared with 

 that of light, 571 ; use of in regulating voice, 

 572,611 

 Sounds, articulate, 612619 



, of heart, 720, 721 ; of placenta, 925 



Spasmodic diseases, '501 504 

 Species, discrimination of, 64 67; variation 

 within limits of, 6873; distinguished by 

 physiological and psychological characters, 



74 77 



Spencer, Earl, on the duration of gestation in 

 Cattle, 931 



