What does Aladdin Lamps and a Nickel have in common?

Back in the 1930s when almost half of the rural U. S. had no electric power many homes and farms used Aladdin Lamps for light. For a Nickel (5 cents ) one could buy more than enough kerosene to fill an Aladdin Lamp. Aladdin Lamps will provide sufficient light to read by. So the family could sit around the table and read or be read to for evening's entertainment, or to get ready for the next day.