Nix, Elizabeth: Did an apple really fall on Isaac Newton’s head? HISTORY.com. Viitattu 21.6.2017. ”After dinner, the weather being warm, we went into the garden, & drank thea under the shade of some apple trees… he told me, he was just in the same situation, as when formerly, the notion of gravitation came into his mind…. occasion’d by the fall of an apple, as he sat in a contemplative mood.”
