Tink′er's-dam.
A wall of dough raised around a place which a plumber desires to flood with a coat of solder.
The material can be but once used; being consequently thrown away as worthless, it has passed into a proverb, usually involving the wrong spelling of the otherwise innocent word “dam.”
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Tinker's-dam. |
An electrophorus may be thus formed.
A vial
a, previously heated, is upset upon a circular plate
b with a turned-over edge.
A circular dam of dough
c is raised
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around the lip, forming a wall to hold the soft solder which holds the insulator-handle to the plate.