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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.”

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 [2576] around the lip, forming a wall to hold the soft solder which holds the insulator-handle to the plate.

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