chapter  V
THE BEGINNINGS OF EXPERIMENTAL PSYCHOLOGY
Pages 24

JustbeforetheperiodoftheseexperimentsDelezenne,2 whowasworkinginthefieldofacoustics,hadhitupon thefactthatifawireofacertainlengthandtensionwas struck,anditspitchcomparedwiththatofasimilarbut slightlylongerwire,aconstantdifferenceinthelength ofthewireswasnecessarytomakepossibleacorrect pitch-discrimination.Heworkedwith240vibrationsper secondasastandard,andfoundhowmuchhigherthepitch ofthesecondtonehadtobeinordertoenablethesubject todistinguishitfromthestandard.Weberseizedupon thisobservationasanotherinstanceofhislaw.But,as Delezennehadusedonlyonestandard,Weberwasmistaken inutilizingthisconclusioninsupportofhisown.From theresultsofalltheexperimentsnoted,Weberbelieved thathisgeneralprinciplewasfoundedonfactsfromtheskin, muscle,eye,andear.