Melting point apparatus, Thiele
Borosilicate glass. An inexpensive apparatus for heating cappillary tubes at accurate rates for the determination of melting points. In use, a capillary tube is wired to a suitable melting point thermometer so that the sample it contains is held close to the thermometer bulb. By means of a drilled cork, the thermometer and capillary are mounted in the Thiele tube, which is filled to just above the side limb with a non-volatile liquid. On heating the bend of the side limb, heated liquid circulates and raises the temperature of the sample in such a way that stirring is unnecessary.
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