Discuss with the pupils the cost and properties of kerosene and the
danger of having a light or too great heat near a can of kerosene.
Explain the draught by means of which the kerosene can be made to burn
on the wick and the danger if the burner becomes clogged up and the
draught is cut off. Have the lamps taken apart, the burners boiled, the
chimneys cleaned, and the body of the lamps filled and wiped off. Then
have the lamps lighted, to see that they burn properly.