CHAPTER XIII.
"Neither do men light a candle, and put it under a bushel, but on a candlestick; and it giveth light unto all that are in the house."—Matt. v.
244. Why will a piece of paper, held three or four inches over the flame of a candle, become scorched?
Because the hot air and gas produced by the burning of the candle ascends rapidly.
245. Why will a piece of paper held about an inch below the flame of a candle scarcely become warmed?
Because the heat ascends; and only a little of it falls upon the paper, and that by radiation.