Book,  Paragraph

 1   I,  1 |          But each is determined relatively to that part which is next
 2   I,  3 |  heaviness or both-but not both relatively to the same thing: for things
 3   I,  3 |      things are heavy and light relatively to one another; air, for
 4   I,  3 |          for instance, is light relatively to water, and water light
 5   I,  3 |       to water, and water light relatively to earth. The body, then,
 6  II,  2 |       and left, in these bodies relatively to ourselves. The reference
 7  II,  2 |       being the exact opposite. Relatively, however, to the secondary
 8  II,  10|         bodies is composite and relatively slow, for the reason that
 9 III,  5 |       and the same body will be relatively to this fire, relatively
10 III,  5 |        relatively to this fire, relatively to something else air. The
11 III,  5 |      all bodies whose parts are relatively fine. (2) If, on the other
12 III,  5 |       say that the same body is relatively to this fire and relatively
13 III,  5 |     relatively to this fire and relatively to that air, to others again
14  IV,  1 |          we say that the one is relatively light, the other relatively
15  IV,  1 |     relatively light, the other relatively heavy. Our predecessors
16  IV,  1 |       the centre. By lighter or relatively light we mean that one,
17  IV,  2 |    number of identical parts is relatively heavy, while that which
18  IV,  2 | composed of a smaller number is relatively light. As a larger quantity
19  IV,  2 |      explain any distinction of relatively light and heavy between
20  IV,  2 |         in every case a body is relatively light when it contains a
21  IV,  2 |        light when it contains a relatively large amount of void. This
22  IV,  5 | different from these but having relatively to each other the character
23  IV,  5 |       bottom of all things, the relatively heavy sinks to its own place