eins, 45.
Difference in parts of, 44.
How it does its work, 45.
Observations on, 60, 61, 62.
Sounds of the, 47.
Valves of, 43.

Heart muscle, structure of, 247.

Heat and cold, effects of, 330.

Hemoglobin, 26.

Hepatic artery, 154.

Hepatic veins, 154.

Hindbrain, 290.

Hinge joint, 231.

Histology, defined, 1.

Humerus, 227.

Hyaloid membrane, 378.

Hydrochloric acid, 149, 150.

Hydrogen, 134.

Hygiene,
Defined, 2.
General aim of, 2.
General laws of, 2, 392.
Of digestion, 160.
Of skeleton, 238.
Relation of physiology and anatomy to, 3.

Hygienic housekeeping, 399.

Hypoglossal nerves, 298.

Ileo-caecal valve, 151.

Ileum, 151.

Images,
Diagram illustrating, 372.
Formation of, 371.

Incisors, 143.

Incus, 359.

Infectious diseases, 394.

Infundibula, 80, 84.

Inhibitory impulse, 305.

Insomnia, 329.

Inspiratory force, 70.

Intercellular material, production of, 13, 18.

Internal ear, 360.

Intestinal juice, 152, 157.

Iris, 375.

Iron, 135.

Irritability, 6, 243, 304.

Isolation, 406.

Jejunum, 151.

Joints, 230-232, 242.

Kidneys, 201.
Blood supply to, 204.
Cortex of, 204.
Inflammation of, 211.
Pelvis of, 202.
Structure, 202.
Symptoms of diseased, 211.
Work of, 205.

Knee jerk reflex, 322.

Lachrymal glands, 383.

Lacteals, work of, 174.

Lacunae, 220.

Laminae, 220.

Large intestine, 157.
Division of, 158.
Work of, 159.

Larynx, 80, 353-357.
To show plan of, 368.

Lever, 251.
Application to the body, 251.
Classes of, in body, 251.
Producing motion, diagram of, 252.
To show action of, 252.

Leucocytes, 27.

Levulose, 120, 150.

Life, maintenance of, 20.

Light, 370, 371.
Simple properties, illustrated, 389.

Light waves, diagram illustrating passage of, 370.

Lime water, to prepare, 101.

Liver, 52, 152-155, 178.
Protection of, 210.
Work of, 206.

Lockjaw, 276.

Longsightedness, 384.

Lung capacity, diagram illustrating, 89.

Lung diseases, out-door cure for, 98.

Lungs, 77-103.
Capacity of, 88.
Changes air undergoes in, 101.
Excretory work of, 207.
Interchange of gases in, 88.
Observations of, 100.
Supply of blood to, 82.
To estimate capacity of, 103.
Weakest portions of, 92.

Lymph, 65-75.
Composition, 66.
Movements at the cells, 71.
Origin of, 65.
Physical properties, 66.
Where it enters the blood,