740 



INDEX. 



Reflex action in the spinal cord, 617 



theory of, 621 

 Reflex centres, special, 625 

 Reflexion, 626 



of nerve cells, 516 

 Refraction, 564 



Refracting media of the eye, 566 

 Reproduction, 648 

 Reserve air, 842 

 Residual air, 342 



Respiration, afferent and efferent 

 nerves, 348 



automatic nerve centre, 346 



chemistry of, 351 



differences in male and female, 

 332, 354 



external, 324 



internal or tissue, 324, 359 



mechanism of, 323 



nervous mechanism of, 344 



of abnormal air, 359 



variations of pressure in, 340 

 Respirations, rate of. 331 

 Respiratory centre in medulla ob- 

 longata, 630 



gas interchange, 353 



sounds, 343 

 Restiform bodies, 630 

 Reticulum, 369 

 Retina, 560, 568, 578 



stimulation of the, 685 



structure of, 681 

 Revolving cylinder, 298 

 Rheoscopic frog, 457 

 Ribs, 329 

 Rigor mortis, 473 

 Ritter's tetanus, 502 

 Rods and cones, 583 



of Corti, 608 

 Rotation of the eyeball, 592 



SACCULES of ear, 717 

 Sacculated glands, 134 

 Saliva, composition of, 188 

 Salivary corpuscles, 138 



glands, 135 



Salivary secretion, nerve mechan- 

 ism of, 141 

 method of, 139 

 Saponification, 170 

 Sarcolactic acid, 455 

 Sarcous elements, 444 

 Sarcolemma, 51, 444 



Scaleni muscles, 335 

 Scheiner's experiment, 569 

 Sclerotic coat of eye, 557 

 Sebaceous glands, 380 

 Secretions, 377 



Secreting gland cells, changes in, 146 

 Segmentation in the ovum, 654 

 Semicircular canals, 605 



development of the, 714 

 Semilunar valves, 261 

 Sensations, general, 547 

 Sense of touch, 537 

 Sensorium, 543 

 Sensory nerve roots, 519 

 Serratus posticus inferior, 338 

 Serum albumin, 68 

 Seventh nerve, 524 

 Sexual distinction, 691 



organs, development of the, 692 

 Shivering, 549 

 Sighing, 350 

 Sight, long, 573 



short, 573 



Skeletal muscles, 477 

 Skin sensations, 537 

 Skull and face, development of the, 



715 



Smell, sense of, 553 

 Sneezing, 350 



centre, 631 

 Sobbing, 350 

 Solar spectrum, 588 

 Somatopleure, 657 

 Sound, 595 



amplitude of vibration, 597 



conduction of, 599 



conduction of, through the ear, 

 602 



conveyance of, in cochlea, 608 



over-tones, 598, 610 



pitch of note, 596 



quality of notes, 697, 610 



rate or period of vibration, 596 



tone, noise, 609 



tones or musical notes, 697 



transmission of, 598 



transmission of, to the brain, 610 

 Sounds, classification of, 495 

 Special reflex centres, micturition, 



etc., 625 

 Special senses, 534 



smell, 553 



taste, 550 



