giene of, 233.

Spinal cord, 280.
Protection of, 299.

Spinal nerves, 295.
Double nature of, 295.

Spitting, 403.

Spleen, 208.

Sprains, 239, 240.

Stapes, 359.

Starch, 162.
Action of, on saliva, 171.
Animal, 120.
Tests for, 136.

Steapsin, 155, 156.

Stegomyia, 403.

Sternum, 225.

Stomach, 147.
Mucous membrane of, 147.
Muscular action of, 150.
Muscular coat, 148.

Serous coat, 148.

Storage of nutriment, 177-179.

"Strenuous life," 410.

Striated fibers, to show, 261.

Striated muscles, to show, 261.

Stroma, 25.

Sugars, kinds, 120.

Sulphur, 135.

Supra-renal bodies, 208.

Suspensory ligament, 377.

Sutures, 230.

Sympathetic ganglia and nerves, 298.
Work of, 316.

Synovial fluid, 231.

Synovial membrane, 231.

System, defined, 20.

Systole, 46.

Taste buds, 345.

Tea,
Effects on digestion, 167.
Effects on heart, 56.

Tears, 383.

Teeth, 142.
Care of 163.
Kinds of, 143.

Temperature,
Body, 207.
Corpuscles, 271, 345.
Sensation, 343.

Tendon of Achilles, 256.

Tendons, 246.

Tests for foods, 136, 137.

Tetanus, 262, 275.

Thoracic cavity, 7, 85, 100, 102.

Thoracic duct, 67, 170.

Thorax, 85.
Bones of, 225.

Tissue enzymes, 182.

Tissues, 4.
Complex nature of, 13.
Defined, 20.
General purposes of, 5.
Kinds of, 5, 6.
Observations on, 12.
Properties of, 6.

Tobacco, effect on heart, 56.

"Tobacco heart," 56, 333.

Tongue, 143.

Tonic bath, 273.

Touch, 343.

Touch corpuscles, 342.

Toxins, 394.

Trachea, 80.

Trypsin, 155, 156.

Tuberculosis, 90, 92, 94, 98.
How communicated, 403.
Outdoor treatment, 98.
To prevent, 404.

Tympanum, 359.

Typhoid fever, 404, 407.

Ulna, 227.

Urea, 110, 205, 207, 210.

Ureters, 170.

Uriniferous tubules, 203.

Vaccination, 406.

Valves,
Advantages of, in veins, 49, 63.
Mitral, 43.
Position of, in veins, 63.
Purposes of, 49, 63.
Tricuspid, 43.

Veins, 47.
Functions of, 51.
Renal, 202.

Ventilation, 94.
Rules for, 95, 96.

Ventricles, 42.
To illustrate action of, 62.

Vermiform appendix, 158.

Vertebrae, 223-225.
Interlocking of, 225.
Joining of, 224.
Kinds, 223.

Vestibule, 361.

Villi, 152.
Parts of, 173, 174.

Visual perceptions, 382.

Visual sensations, 382.

Vitreous humor, 378.

Vocal cords, 355.

Voice, 353-357.
How produced, 356.
Pitch and inten