????????????????????????????????????????????????????????????????????? ??, ??? ?? ???? ??? ???, ???? ??? ??? ??? ? ?????.René Descartes's sketch of how Main and secondary rainbows are formed, Discours de la Méthode, 1637. Descartes' 1637 treatise, Discourse on System (Discours de la Méthode), even more Innovative this rationalization. Recognizing