_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.

The general properties of heat, conduction, convection, radiation,
reflection--Cooking done by radiation the simplest but most wasteful
mode: by convection (as in stoves and furnaces) the cheapest--The
range--The model cooking-stove--Interior arrangements and
principles--Contrivances for economizing heat, labor, time, fuel,