Jolly balance

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English[edit]

A Jolly balance from 1913
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Etymology[edit]

Invented by the German physicist Philipp von Jolly in 1864.

Noun[edit]

Jolly balance (plural Jolly balances)

  1. An instrument for determining specific gravity by comparing how much an object stretches a spring when held in a pan hanging in the air to how much that same object stretches a spring when held in a pan underwater.
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