▁he ▁studied ▁ac oust ic ▁phen omena . ▁F ole y ▁worked ▁on ▁theories ▁of ▁sound ▁ampl ification , ▁leading ▁to ▁pat ents ▁for ▁the ▁ideal ▁shapes ▁of ▁horn s ▁for ▁musical ▁instruments , ▁and ▁for ▁the ▁optim um ▁pla cement ▁of ▁locomot ive ▁wh ist les ▁He ▁photograph ed ▁sound ▁waves . ▁ ▁F ole y ▁worked ▁on ▁theories ▁of ▁sound ▁ampl ification , ▁leading ▁to ▁pat ents ▁for ▁the ▁ideal ▁shapes ▁of ▁horn s ▁for ▁musical ▁instruments . ▁and ▁for ▁the ▁optim um ▁pla cement ▁of ▁locomot ive ▁wh ist les . ▁He ▁measured ▁the ▁speed ▁of ▁sound ▁in ▁open ▁air ▁and ▁within ▁musical ▁instruments . ▁ ▁P . ▁Bla k ist on ’ s ▁Son ▁& ▁Company , ▁Inc . ▁of ▁Philadelphia ▁published ▁his ▁college ▁text book , ▁College ▁Physics , ▁in ▁ 1 9 3 3 . ▁The ▁third ▁edition ▁appeared ▁in ▁ 1 9 4 1 . ▁ ▁G amma ▁of ▁Indiana ▁Chapter ▁of ▁Ph i ▁B eta ▁K appa ▁at ▁Indiana ▁University ▁was ▁char tered ▁in ▁ 1 9 1 1 . ▁In ▁addition ▁to ▁members ▁of ▁the ▁Senior ▁Class , ▁several ▁out standing ▁Indiana ▁University ▁al umn i ▁were ▁also ▁elected . ▁Arthur ▁Lee ▁F ole y , ▁Rol la ▁Roy ▁Ram sey , ▁Albert ▁Fred rick ▁Ott om ar ▁Germ ann , ▁and ▁Ross ▁Franklin ▁Lock ridge , ▁Sr . ▁were ▁among ▁the ▁al umn i ▁elected ▁in ▁ 1 9 1 1 . ▁ ▁F ole y ▁played ▁significant ▁roles ▁in ▁building ▁the ▁Indiana