1 9 0 7 , ▁S iem ens ▁( S iem ens ▁& ▁H als ke ▁and ▁S iem ens - Sch uck ert ) ▁had ▁ 3 4 , 3 2 4 ▁employees ▁and ▁was ▁the ▁sevent h - larg est ▁company ▁in ▁the ▁German ▁emp ire ▁by ▁number ▁of ▁employees . ▁( see ▁List ▁of ▁German ▁companies ▁by ▁employees ▁in ▁ 1 9 0 7 ) ▁ ▁In ▁ 1 9 1 9 , ▁S ▁& ▁H ▁and ▁two ▁other ▁companies ▁joint ly ▁formed ▁the ▁Os ram ▁light bul b ▁company . ▁ ▁During ▁the ▁ 1 9 2 0 s ▁and ▁ 1 9 3 0 s , ▁S ▁& ▁H ▁started ▁to ▁manufact ure ▁rad ios , ▁television ▁sets , ▁and ▁electron ▁micro scop es . ▁ ▁In ▁ 1 9 3 2 , ▁Rein iger , ▁Geb bert ▁& ▁Sch all ▁( E rl angen ), ▁Ph ön ix ▁AG ▁( R ud ol stadt ) ▁and ▁S iem ens - Re in iger - V e ifa ▁m b H ▁( Ber lin ) ▁merged ▁to ▁form ▁the ▁S iem ens - Re in iger - W er ke ▁AG ▁( SR W ), ▁the ▁third ▁of ▁the ▁so - called ▁parent ▁companies ▁that ▁merged ▁in ▁ 1 9 6 6 ▁to ▁form ▁the ▁present - day ▁S iem ens ▁AG . ▁ ▁In ▁the ▁ 1 9 2 0 s , ▁S iem ens ▁constructed ▁the ▁Ar dn ac r ush a ▁H ydro ▁Power ▁station