Essay titled 'A short history of the introduction and development of Wireless Telegraphy for Naval purposes, together with a consideration of the difficulties to overcome, and the dangers to be guarded against', by Alan Archibald Campbell Swinton Short history of the introduction and development of Wireless Telegraphy for Naval purposes, in three parts: Part 1) The Development of Practical Wireless Telegraphy Part 2) Short description of the manner in which the effective distance of wireless telegraphy has been increased a thousanfold in the course of the six years Part 3) Long Distance Transmission c 1920s