Bunsen burner

A Bunsen burner was a piece of laboratory equipment used to heat substances.

When Captain Mike Yates secretly made hot cocoa in the Third Doctor's lab, he used his Bunsen burner. The Doctor briefly speculated that it had activated an Auton doll, although he soon found out it was in fact the radio signals from Yates' radio transmitter. (TV: Terror of the Autons)

On a freezing March day, science teacher Ian Chesterton tried to heat up his Coal Hill School lab by putting the Bunsen burners on full blast — to no avail. (PROSE: Time and Relative)