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can be no greater treat to any one fond of scientific pursuits than attend a course of these lectures . James ( 2007 ) notes that the popularity of the afternoon lectures the RI was so high in Davy's time that it led to the creation the first one - way street in London , clearly emphasising the value and esteem to the events by the wider population . Public lectures continued in much the same vein the days of Davy , Faraday and Ørsted , with the ability to present a lecture a standard requirement of most scientific roles ( for tips on presentation skills for public science communication lectures see Bultitude , 2010 ) . , in part due to the cultural factors raised , increasing importance is placed on the inclusion of ? interactive' elements public lectures , in order to ensure greater involvement of the audience . A more recent innovation these lines used electronic voting handsets to allow the audience ? choose their own lecture' ? i . e . select a range of options offered by the presenters , in order to allow the audience to take more control the direction of the lecture ( Bultitude and Grant , 2006 ) . The international Café Scientifique network has the level of interactivity even further , instituting informal events involving a speaker and an audience that occur in public locations as cafés and bars ( Grand , 2009 : 210 ) : Cafés Scientifiques classically start with a short introductory talk by an ? expert' .