Enclosure N - Copy of letter from Professor V Bjerknes, Blinderen, Oslo, Norway to Sir Alfred Egerton, Royal Society Concerning the manuscript of the paper of Heinrich Hertz, 'Ueber elektrodynamische Wellen in Luftraume und deren Reflexion' which proveed the real existence of the electric waves. and his sending it to the Royal Society. He wishes it to supplement the other fundamental paper donated by Mrs Hertz 'Ueber strahlen elektrischer Kraft' . 22 February 1947