Book,  Paragraph

 1   I,  3|     every body either possesses lightness or heaviness. As a preliminary
 2   I,  3|     either up or down possesses lightness or heaviness or both-but
 3   I,  3|     possess either heaviness or lightness. For neither naturally nor
 4   I,  3|        this body can possess no lightness or heaviness at all (for
 5   I,  6|        same argument applies to lightness: for as the one supposition
 6   I,  6|       surface involves infinite lightness.) This is proved as follows.
 7   I,  6|        applies also to infinite lightness. Bodies then of infinite
 8   I,  6| infinite weight and of infinite lightness are equally impossible.~
 9   I,  7|      shown, infinite weight and lightness do not exist. Moreover it
10   I,  7|     infinite weight or infinite lightness. Nor, secondly, could the
11   I,  7|         speaking, light: and if lightness be universal, none is heavy.
12   I,  7|    whatever possesses weight or lightness will have its place either
13   I,  7|  everything possesses weight or lightness, but some things do and
14   I,  8|        if speed then weight and lightness. For as superior speed in
15  II,  3|      stand for the privation of lightness and movement. But further,
16 III,  1|      heaviness of earth and the lightness of fire, then some of the
17 III,  1|         endowed with weight and lightness, but an assemblage of units
18 III,  2|   impetus is that of weight and lightness. Of necessity, we assert,
19 III,  2|  argument would fit the case of lightness. Again, a body which is
20 III,  2|      but has neither weight nor lightness, must be moved by constraint,
21 III,  2|       have a definite weight or lightness. But since "nature" means
22 III,  6|        body possesses weight or lightness, it will be one of the elements;
23  IV,  1|      the relative heaviness and lightness of things possessing weight.
24  IV,  2|  requires an addition. Relative lightness must depend not only on
25  IV,  2|        proportion, the relative lightness will disappear. Thus fire,
26  IV,  2|         those who attribute the lightness of fire to its containing
27  IV,  2|        account for the relative lightness and heaviness of bodies
28  IV,  2|       be given for the relative lightness and heaviness of the bodies
29  IV,  3|       which produces weight and lightness, and that which is moved
30  IV,  4|     bodies which do not combine lightness and heaviness. It is apparent,
31  IV,  4|  swifter. But the heaviness and lightness of bodies which combine
32  IV,  4|      weight, the other absolute lightness, since air in any quantity
33  IV,  4|      the presence of plenum and lightness to that of void. It is due
34  IV,  4|        weight and all but earth lightness. Earth, then, and bodies
35  IV,  4|   weight. Neither has earth any lightness, since it sinks to the bottom
36  IV,  5|        and water each have both lightness and weight, and water sinks
37  IV,  5|    endowed with both weight and lightness has weightwhereas earth
38  IV,  5|   everywhere-but they only have lightness among bodies to whose surface
39  IV,  5|      own place, as earth has no lightness. The other two move downward
40  IV,  5|       same reasoning applies to lightness, if that is supposed to