When sparks are seen on the bottom of the tea-kettle, it is a sign that folks are going home from meeting.
New Hampshire and Boxford, Mass.

When sparks are seen on the bottom of the tea-kettle, it is a sign that folks are going home from meeting.
Source: Current Superstitions (1896), entry 1459.
Fanny D. Bergen, editor.
Modern normalized navigation; the historical attribution above remains unchanged.