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.'