Nezmer ad nini d akken anulfu n rradyu ur yettwaḥsab ara ɣer yiwen n umussnaw, tennerna deg ufus n waṭas, amezwaru i yebdan tikti d amussnaw Max will deg useggas n 1867 syenna yesnerna-tt umussnaw Tomas addison, maca deg useggas n 1888 yuɣal unulfu n rradyu yettwaḥsab ɣer umussnaw Henrech Hertez.