Book,  Paragraph

 1   I,  3 | opening discussions. Now the motions of contraries are contrary.
 2   I,  3 |    are only these two simple motions, the circular and the straight,
 3   I,  4 |     follows that the reverse motions on the complete circumference
 4   I,  4 | those of places.) One of the motions, then, would be ineffective,
 5   I,  4 |  ineffective, for if the two motions were of equal strength,
 6   I,  6 |      the upward and downward motions are contraries and are therefore
 7   I,  6 | contraries and are therefore motions towards contrary places.
 8  II,  1 |     contains those imperfect motions which have a limit and a
 9  II,  6 |      appear in all irregular motions. The maximum may occur either
10  II,  12|     while the numerous other motions move only one each, since
11  II,  12|      moves with a variety of motions. Thus, then, nature makes
12  II,  12|      to the single body many motions. And there is a second reason
13  II,  12|  second reason why the other motions have each only one body,
14  II,  14|    necessarily move with two motions. But if this were so, there
15  II,  14|  also from the fact that the motions of heavy bodies always make
16 III,  2 |      infinite variety, their motions too must be infinitely varied.
17 III,  2 |    diversity of direction in motions: indeed, in the world we
18 III,  4 | infinite, because the simple motions are only two and the number
19 III,  8 |      properties, powers, and motions, to which they paid particular
20  IV,  3 |    The reason of the various motions of the various bodies, and