Letter from [Alan Archibald Campbell] Swinton, to Professor A. Korn, Techniche Hochansthalt, Charlottenberg, Berlin Draws attention to Korn's recently published abstract of a paper "Sur Frage Des Bildrundfunks" in the E. T. Z. for 29 November 1928, where he identifies that Korn has expressed the same opinion that he has repeatedly published, that no practical television can be obtained until several hundred thousand signals per second can be registered. Encloses one of the last 23 February 1929