One of the first anti hail cannon conferences probably took place during 1899 in Casale, Italy. M. Ottavi, deputy of the Italian Parliament, was the organizer of this “investigative” congress.
For ages people have been trying to influence the weather, the images below show some examples for the design of the silent anti-hail cannon.
The exhibition of anti-hail cannons at the Third International Congress on Hail Guns was held in Lyon in 1901.
The anti-hail cannon of the old castle of Banska Stiavnica (Slovakia). It was probably designed by Julius Sokol.