Action of external objects. Excitability. Its laws. Action of light.
Of Heat. Of food. Sound. Odours.

LECTURE X, ON THE LAWS OF ANIMAL LIFE.

General laws. Sleep. Degrees of excitability. Health. Comparison with a furnace. Oxidation. Electricity. Hydrogen. Theory of muscular contraction.

LECTURE XI, OF THE NATURE AND CAUSES OF DISEASES.

Brown's theory. Sthenic and asthenic diseases. Debility. Sthenic depression of spirits. Scale of excitability. Fallacy of symptoms Effects of cold. Alcohol. Sthenic diseases.

LECTURE XII, ON INFLAMMATION AND ASTHENIC DISEASES.

Nature of inflammation. Distention of the arteries. Cure of ophthalmias. Asthenic diseases. Cold. Intemperance. Mental exertions. Classes of diseases. Cure. Oxidation.

LECTURE XIII, ON THE GOUT.

Effects of the gout. Gout not hereditary. Symptoms. Causes.
Affections of the stomach. Cure. Use of electricity. Diet.

LECTURE XIV, ON NERVOUS COMPLAINTS.