Enlightening Experience

The farmer's wife asked the doctor about her husband's chronic biliousness and was advised to give him liquid paraffin. The good lady purchased paraffin oil in error and gave some to her husband. He was very ill next day so the lady returned to the doctor and told him she had given her man a cup of paraffin oil.
'He's worse, Doctor. What shall I do?' she asked.
The doctor replied, 'buy a yard of wick, ma'am. Use your imagination on where to put it. Put a match to it and you'll have light for the winter.'