Thiele tube

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Science and technology

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What Wikipedia says

The Thiele tube, named after the German chemist Johannes Thiele, is a laboratory glassware designed to contain and heat an oil bath. Such a setup is commonly used in the determination of the melting point or boiling point of a substance. The apparatus resembles a glass test tube with an attached handle.

Excerpt from the Wikipedia article “Thiele tube”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Zorakoid (talk), Public domain, via Wikimedia Commons.