If a speck of carbon comes on the wick when burning, and you wish for something, wet your finger and touch the speck. If it sticks to your finger, you will get the wish, and vice versa.
Plymouth, O.

If a speck of carbon comes on the wick when burning, and you wish for something, wet your finger and touch the speck. If it sticks to your finger, you will get the wish, and vice versa.
Source: Current Superstitions (1896), entry 434.
Fanny D. Bergen, editor.
Modern normalized navigation; the historical attribution above remains unchanged.