[74] The opinion that ionisation of the air by sunlight is a cause of obstruction to Hertzian waves propagated over long distances has also been expressed by Mr. J. E. Taylor. See Proc. Roy. Soc., Vol. LXXI., p. 225, 1903. "Characteristics of Earth Current Disturbances and their Origin."
[75] See Proc. Roy. Soc., May 15, 1902. "On Some Phenomena affecting the Transmission of Electric Waves over the Surface of the Sea and Earth," by Captain H. B. Jackson, R.N., F.R.S.
[76] Mr. Marconi has informed the writer that these strategic questions have received attention in selecting the sites for large Marconi power stations in Italy.
Detailed Transcriber's Notes
The text has been made to match the original text as much as possible retaining all apparent printer's errors and inconsistencies. The following, detail the apparent printer's errors etc. identified in the original text.
Variation in spelling, Strasburg and Strassburg for Strasbourg.
There are a number of inconsistencies in hyphenation present in the original text. Those concerned with the variation between one word or a hyphenated word are detailed below. Those concerned with the variation between multiple words and hyphenated words are too numerous to detail individually.
Inconsistent hyphenation of word, 'anti-node' and 'antinode' both present in original text.
Inconsistent hyphenation of word, 'electro-dynamic' and 'electrodynamic' both present in original text.