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, trouble, and expense—Its durability, simplicity, etc.—Chimneys: why they smoke and how to cure them—Furnaces: the dryness of their heat—Necessity of moisture in warm air—How to obtain and regulate it.