Cut out a piece of tinfoil the size of the surfaces to be soldered.
Then dip a feather in a solution of sal ammoniac, and wet over the
surfaces of the metal, then place them in their proper position with
the tinfoil between. Put the metals thus arranged on a piece of iron
hot enough to melt the foil. When cold the surfaces will be found
firmly soldered together.
[WHO NEVER TRIES CANNOT WIN THE PRIZE.]