CHAPTER VII.

ON THE CARE OF HEALTH.

Importance of some Knowledge of the Body and its Needs—Fearful Responsibility of entering upon domestic Duties in Ignorance—The fundamental vital Principle—Cell-life—Wonders of the Microscope—Cell-multiplication—Constant interplay of Decay and Growth necessary to Life—The red and white Cells of the Blood—Secreting and converting Power—The nervous System—The Brain and the Nerves—Structural Arrangement and Functions—The ganglionic System—The nervous Fluid—Necessity of properly apportioned Exercise to Nerves of Sensation and of Motion—Evils of excessive or insufficient Exercise—Equal Development of the Whole 199