Richard Fry wrote:
Radio waves behaved the same in 1915 as they do now.

Well sort of :-)

Before (and during) WWI, anything below 200 meters (over 1.5 mHz) was
considered too high in frequency to be useful.

Geoff.

--
Geoffrey S. Mendelson N3OWJ/4X1GM
Those who cannot remember the past are condemned to misquote it.