The Combustion Orchestra

In the 1870s, inventor Frédéric Kastner looked at a church organ and decided it was missing one crucial element: fire. The result was the pyrophone, a musical instrument that replaced the traditional bellows of a pipe organ with enclosed hydrogen flames.

The instrument relied on what physicists called the singing flame. When a hydrogen flame is positioned at the base of a glass tube, it creates steady vibrations and musical notes determined purely by the tube's length and size. To play a melody, the operator manipulated keys that brought multiple flames into contact with one another inside the tubes, causing the sound to instantly cease through acoustic interference.

It was an ambitious attempt to turn controlled combustion into art. It was also remarkably hazardous. The pyrophone faced severe safety issues, culminating in at least one performance where a model quite literally exploded during a concert, injuring people in the audience.

Building an instrument powered by miniature explosions makes a certain kind of 19th-century sense, a time when inventors were trying to harness combustion for everything. But there is a fine line between a musical masterpiece and a pipe bomb that plays in C-major. Kastner ultimately learned that when you invite fire into the orchestra, it insists on playing its own percussion.