( Finally ( , ( ( ( place ( ( the ( iron rod ) ) ( in ( the ( two solenoids ) ) ) ) ) ( to ( demonstrate ( ( the effect ) ( of ( increasing ( ( the permeability ) ( of ( the core ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Finally)) (, ,) (VP (VB place) (NP (NP (DT the) (NN iron) (NN rod)) (PP (IN in) (NP (DT the) (CD two) (NNS solenoids)))) (S (VP (TO to) (VP (VB demonstrate) (NP (NP (DT the) (NN effect)) (PP (IN of) (S (VP (VBG increasing) (NP (NP (DT the) (NN permeability)) (PP (IN of) (NP (DT the) (NN core)))))))))))) (. .)))
Finally, place the iron rod in the two solenoids to demonstrate the effect of increasing the permeability of the core.
(ROOT (S (NP (DT An) (NN electormagnet)) (VP (VBZ is) (NP (NP (DT a) (NN piece)) (PP (IN of) (NP (NP (NN iron)) (PP (IN inside) (NP (DT a) (NN solenoid))))))) (. .)))