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.
IV.
_SCIENTIFIC DOMESTIC VENTILATION._
An open fireplace secures due ventilation--Evils of substituting
air-tight stoves and furnace heating--Tendency of warm air to rise and
of cool air to sink--Ventilation of mines--Ignorance of architects--Poor
ventilation in most houses--Mode of ventilating laboratories--Creation
of a current of warm air in a flue open at top and bottom of the
room--Flue to be built into chimney: method of utilizing it.
V. STOVES, FURNACES, AND CHIMNEYS.
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