Calzecchi demonstrated in experiments in 1884 through 1886 that iron filings contained in an insulating tube will conduct an electric current under the action of an electromagnetic wave.

Calzecchi graduated from the University of Pisa after studying the physical sciences and mathematics, then devoted himself to teaching in high schools and then scientific research.

Meanwhile, the great physics discoveries of Heinrich Hertz, Wilhelm Conrad Röntgen, Nicola Tesla and Augusto Righi were made, including the transmission of telegraph signals without wires.

Since 1884 Calzecchi had been researching the properties of metal powders, finding high electrical conductivity due to various excitations such as extra current, lightning, electrostatic induction, etc.

These studies by Calzecchi predate by nearly six years those of the French physicist Edouard Branly and Oliver Lodge in England, although they are largely credited with the discovery.