III.

_A HEALTHFUL HOME._

Household murder--Poisoning and starvation the inevitable result of bad air in public halls and private homes--Good air as needful as good food--Structure and operations of the lungs and their capillaries and air-cells--How people in a confined room will deprive the air of oxygen and overload it with refuse carbonic acid-Starvation of the living body deprived of oxygen--The skin and its twenty-eight miles of perspiratory tubes--Reciprocal action of plants and animals--Historical examples of foul-air poisoning--Outward effects of habitual breathing of bad air--Quotations from scientific authorities.