Book, Paragraph

 1   I, 1|      the corporeal elements are four, while all the elements-including
 2   I, 1|       Water, Air, and Earth are four elements, and are thus "
 3  II, 1|       as well, thus postulating four.)~Now we may agree that
 4  II, 2| differences reduce to the first four, but that these admit of
 5  II, 2|      moist. Hence these must be four.~
 6  II, 3|        elementary qualities are four, and any four terms can
 7  II, 3|     qualities are four, and any four terms can be combined in
 8  II, 3|    elementary qualities will be four: hot with dry and moist
 9  II, 3|      cold with moist. And these four couples have attached themselves
10  II, 3|       one, or two, or three, or four. Now (i) those who assert
11  II, 3|          But (iv) some advocate four from the start, e.g. Empedocles:
12  II, 3|          bodies, since they are four, fall into two pairs which
13  II, 3|    Nevertheless, since they are four, each of them is characterized
14  II, 5|  neither is there, beside these four, some other body from which
15  II, 5|          the "elements" must be four (as they evidently are)
16  II, 5|          for the couplings" are four, since, though six are possible,
17  II, 5|      not the same as any of the four, E W A and F. Let K, then,
18  II, 5|       Then K will belong to all four, E W A and F: for they are