But would the dictum of "no separate magnetic poles" still hold true in a far more delicate test - say, if you substituted microscopic particles of iron or other magnetic metals, as tiny as particles of smoke, for the massive chunk of rock that Peregrinus used ?
(you; substituted; microscopic particles of iron or other magnetic metals, as tiny as particles of smoke, for the massive chunk of rock) (rock; used; Peregrinus)
you rock
substituted used
microscopic particles of iron or other magnetic metals, as tiny as particles of smoke, for the massive chunk of rock
Peregrinus