2094. What is the smoke of a candle?
2095. Solid particles of carbon, separated from the wick and tallow, but not consumed.
2096. Why are some particles consumed and not others?
2097. The combustion of the carbon depends upon its combining with the oxygen of the air. Now, as the outer surface of the flame prevents the access of air to the interior parts, much of the carbon of those parts passes off in smoke.
2098. Why do lamps smoke?
2099. Either because the wick is cut unevenly, or else because it is turned up too high.