6 - 8 ; ▁ 4 8 0 ) ▁Tim othy ▁P . ▁K iel ty ▁- ▁Princi pal ▁High ▁school ▁Jonathan ▁Day ton ▁High ▁School ▁( 9 - 1 2 ; ▁ 6 1 1 ) ▁Dr . ▁Norman ▁Francis ▁Jr . ▁- ▁Princi pal ▁ ▁Administration ▁Core ▁members ▁of ▁the ▁district ' s ▁administration ▁are : ▁Michael ▁A . ▁Dav ino , ▁Super int endent ▁Matthew ▁Clar ke , ▁School ▁Business ▁Administr ator ▁/ ▁Board ▁Secretary ▁ ▁References ▁ ▁External ▁links ▁ ▁Spring field ▁Public ▁School s ▁▁ ▁School ▁Data ▁for ▁the ▁Spring field ▁Public ▁School s , ▁National ▁Center ▁for ▁Education ▁Statistics ▁▁ ▁Category : Spring field ▁Township , ▁Union ▁County , ▁New ▁Jersey ▁Category : New ▁Jersey ▁District ▁F actor ▁Group ▁G H ▁Category : Sch ool ▁districts ▁in ▁Union ▁County , ▁New ▁Jersey <0x0A> </s> ▁Carl ▁Ludwig ▁David ▁Friedrich ▁He us ler ▁( 1 ▁February ▁ 1 8 6 6 , ▁D ill enburg ▁– ▁ 2 5 ▁October ▁ 1 9 4 7 ) ▁was ▁a ▁German ▁min ing ▁engineer ▁and ▁chem ist . ▁He ▁discovered ▁a ▁special ▁group ▁of ▁inter met all ics ▁now ▁known ▁as ▁He us ler ▁phases , ▁which ▁are ▁fer romagnet ic ▁though ▁the ▁const itut ing ▁elements ▁are ▁not ▁fer romagnet ic . ▁ ▁Biography ▁He ▁was ▁born ▁as ▁son ▁of ▁Con rad ▁He us ler ▁the ▁owner ▁of ▁the ▁Is ab ellen h üt te ▁D ill enburg , ▁a ▁non - fer r ous ▁metal ▁works . ▁He ▁studied