▁Regarding ▁the ▁Rel ativity ▁Princi ple , ▁the ▁moving ▁magnet ▁and ▁conduct or ▁problem ▁( poss ibly ▁after ▁reading ▁a ▁book ▁of ▁August ▁F ö pp l ) ▁and ▁the ▁various ▁negative ▁a ether ▁dr ift ▁experiments ▁were ▁important ▁for ▁him ▁to ▁accept ▁that ▁principle   — ▁but ▁he ▁denied ▁any ▁significant ▁influence ▁of ▁the ▁most ▁important ▁experiment : ▁the ▁Michel son – Mor ley ▁experiment . ▁Other ▁likely ▁influ ences ▁include ▁Po inc ar é ' s ▁Science ▁and ▁Hyp oth esis , ▁where ▁Po inc ar é ▁presented ▁the ▁Princi ple ▁of ▁Rel ativity ▁( which , ▁as ▁has ▁been ▁reported ▁by ▁Ein stein ' s ▁friend ▁Maurice ▁Sol ov ine , ▁was ▁closely ▁studied ▁and ▁discussed ▁by ▁Ein stein ▁and ▁his ▁friends ▁over ▁a ▁period ▁of ▁years ▁before ▁the ▁publication ▁of ▁Ein stein ' s ▁ 1 9 0 5 ▁paper ), ▁and ▁the ▁writ ings ▁of ▁Max ▁Abraham , ▁from ▁whom ▁he ▁borrow ed ▁the ▁terms ▁" Max well - H ert z ▁equations " ▁and ▁" long itud inal ▁and ▁trans verse ▁mass ". ▁ ▁Regarding ▁his ▁views ▁on ▁Elect rod ynam ics ▁and ▁the ▁Princi ple ▁of ▁the ▁Const ancy ▁of ▁Light , ▁Ein stein ▁stated ▁that ▁Lor ent z ' s ▁theory ▁of ▁ 1 8 9 5 ▁( or ▁the ▁Max well - L or ent z ▁elect rod ynam ics ) ▁and ▁also ▁the ▁F ize au ▁experiment ▁had ▁considerable ▁influence ▁on ▁his ▁thinking . ▁He ▁said ▁in ▁ 1 9 0 9 ▁and