1930s isn't exactly ancient history. By 1930, for example, we had commercial aviation, a long-distance phone network, and experimental television stations. Of

1930s isn't exactly ancient history. By 1930, for example, we had commercial aviation, a long-distance phone network, and experimental television stations. Of course we also had vacuum cleaners, steam engines, automobiles, combines, and all sorts of other things that needed manuals. At https://youtu.be/rUg_ukBwsyo?t=310 https://youtu.be/rUg_ukBwsyo?t=310 you can hear mention of the manual that came with a 1925 steam car. ("In the handbook it says 'Things for your man to do every day.'") To be concrete, here's a copy of the instruction manual for a 51-P Crosley radio receiver from 1924: http://www.crosleyradios.com/pdf/51P_Operating_Instructions.pdf http://www.crosleyradios.com/pdf/51P_Operating_Instructions.... . A "Manual of wireless telegraphy (radio) for the use of naval electricians" from 1915: http://babel.hathitrust.org/cgi/pt?id=nyp.33433023245677;view=1up;seq=9 http://babel.hathitrust.org/cgi/pt?id=nyp.33433023245677;vie... . And "A practical guide for the use of the Edison phonograph" from 1892: http://babel.hathitrust.org/cgi/pt?id=nyp.33433023245677;view=1up;seq=9 http://babel.hathitrust.org/cgi/pt?id=nyp.33433023245677;vie...