88 pages matching editions:UOM39015021061315 in this book
What people are saying - Write a review
We haven't found any reviews in the usual places.
Other editions - View all
aerial telegraphy antenna arrangement balloon battery boat cable capacity Carlo Alberta centimetres coherer communication condenser conducted connected copper wire detector diameter discharge discovery distance Dolbear ductor earth earth-plates effect electric waves electro-magnetic waves etheric wave exciter experiments feet Fessenden Flat Holm galvanometer ground height Hertz Hertzian waves induction coil instrument invention inventor investigations kilometres later Lavernock Point length lighthouse Lightship Lindsay Marconi mast means ments mercury messages metal plates method metres microphone miles Morse key nected needle obtained oscillations pass patent Poldhu poles possible practical Preece's Professor Trowbridge receiving apparatus receiving circuit relay researches resistance sending station sensitive ship shore shown in Fig signals siphon recorder Sir Oliver Lodge sparks Steep Holm Steinheil successful surface syntony tele telegraphy without wires telephone terminal tion trans transmission transmitting Trowbridge tube vertical conductor vertical wire vessels William Preece Wimereux wireless telegraphy yards