wˌaɪlst æt kˈɜːnɪɡsbˌɜːɡ, wˈaɪtʃɚt wʌz ɪnvˈɛstᵻɡˌeɪɾɪŋ ðə nˈeɪtʃɚɹ ʌv ˈɛksɹˈeɪz ænd bɪkˌeɪm wˈʌn ʌvðə fˈɜːst tə dɪskˈʌvɚ ðæt kˈæθoʊd ɹˈeɪz ɑːɹ mˌeɪd ˌʌp ʌv pˈɑːɹɾɪkəl stɹˈiːmz.
Whilst at Königsberg, Wiechert was investigating the nature of X-rays and became one of the first to discover that cathode rays are made up of particle streams.