Why does ice melt more slowly when wrapped in flannel?
Because the flannel is a poor conductor, and keeps the heat of the air from the ice.
Why are woollen holders used about the stove?
Because wool is a poor conductor, and thus keeps the heat of the iron from burning the hand.
Convection of Heat.
When air near the floor of a room is heated, what becomes of it?
It ascends to the ceiling of the room.
What is done with the cold air at the ceiling?
It descends to the floor, to take the place of the warm air.
When the air ascends to the ceiling, does it carry the heat with it?