Complex sentence: In the second part of the book, Huygens states three hypotheses on the motion of bodies, which he uses to re-derive Galileo's original study on falling bodies, based on clearer logical framework.
Split into simpler sentences: In the second part of the book, Huygens states three hypotheses on the motion of bodies. He then uses these three rules to re-derive Galileo's original study of falling bodies, based on clearer logical framework.