Bunsen

Broad, low tables were scattered about, which bristled with retorts, test-tubes, and little Bunsen lamps, with their blue flickering flames.

A large curved retort was boiling furiously in the bluish flame of a Bunsen burner, and the distilled drops were condensing into a two-litre measure.

Potassium, heated with a Bunsen burner, turns the flame purple.

Potassium, heated with a Bunsen burner, gives the flame a lilac color.

Calcium, heated with a Bunsen burner, turns the flame orange-red.