Erik Jan Hanussen was an Austrian charlatan who lived from 1889 to 1933, allegedly a clairvoyant and mentalist. He knew Adolf Hitler, personally, perhaps taught him a trick or two, and was killed by the Nazis. Among other things, he wrote a novel about New York's destruction, which may be considered SF or meant as a prophecy, but it's not what my question is about.
In the afterword to the Italian translation of Hanussen's novel, La fine di New York (published by Edizioni Mediterranee in 1989), Gianfranco de Turris, a respected Italian science fiction historian and author, talks (in Italian) about other texts containing speculations about the notion of “atom smashing” before Hanussen, among them H.G. Wells's The World Set Free and “The Secret Atom by the American Francis Lynch (1915)”.
Now, I am not able to find other information about Lynch or his novel/short story. Is anybody able to help? Is he completely forgotten? Might it be an erudite joke by de Turris?