Source: https://en.wikipedia.org/wiki/Alexander_Stepanovich_Popov
His paper on his experiments: "On the relation of metallic powders to electrical oscillations", was published 15 December 1895. He did not apply for a patent for his invention.[3] In July 1895 he installed his receiver and a siphon recorder on the roof of the Institute of Forestry building in St. Petersburg.[1] and was able to detect thunderstorms at a range of 50 km,[4] however he was also aware of its communication potential. His paper, read at the 7 May 1895 meeting, concluded:[2][4]
I can express my hope that my apparatus will be applied for signaling at great distances by electric vibrations of high frequency, as soon as there will be invented a more powerful generator of such vibrations.
In 1896, the article depicting Popov's invention was reprinted in the 'Journal of the Russian Physical and Chemical Society'. In March 1896, he effected transmission of radio waves between different campus buildings in St. Petersburg. In November 1897, the French entrepreneur Eugene Ducretet made a transmitter and receiver based on wireless telegraphy in his own laboratory. According to Ducretet, he built his devices using Popov's lightning detector as a model. By 1898, Ducretet was manufacturing equipment of wireless telegraphy based on Popov's instructions. At the same time Popov effected ship-to-shore communication over a distance of 6 miles in 1898 and 30 miles in 1899.