In 1897, with Marconi radio experiments from
Lavernock Point in south Wales to the island of
Flat Holm, Preece became one of Marconi's most ardent supporters. He made various efforts to support
Guglielmo Marconi in the wireless field. Preece gained financial assistance from the Post Office to help expand Marconi's work. Preece believed incorrectly that the
Earth's magnetic field was critical in the propagation of radio waves over long distances. He had a long-standing rivalry with Oliver Heaviside over his understanding of electricity. It was derisively referred to as "the
drain-pipe theory" by Heaviside, because Preece relied on an analogy between electricity and water for
thought experiments. Reportedly, he rejected and never understood
James Clerk Maxwell's advances to
mathematical physics, and insisted that adding inductance to a telegraph line could only be detrimental, even while Maxwell's and Heaviside's theory and experiments showed that inductance could help. Preece once stated, conveying sentiments later expressed by
Edwin Armstrong, Preece served as president of the
Institution of Civil Engineers between April 1898 and November 1899. {{Citation | first = Garth | last = Watson| title = The Civils | publisher = London: Thomas Telford Ltd | page = 252 ==References==