Book,  Paragraph

 1   I,  18|    two causes, weakness and strength; the former prevents concoction
 2   I,  18| weakness as well as through strength, when a great quantity of
 3  II,  4 |   to move anything, because strength arises through holding the
 4 III,  2 |  the weather owing to their strength, those of birds are more
 5   V,  4 |   have recovered health and strength again they change, becoming
 6   V,  5 |    and therefore it has not strength to change the hairs; on
 7   V,  7 |  which is moved surpass the strength of that which moves it,
 8   V,  7 |   then, on account of their strength, sometimes move much air
 9   V,  7 | move too much air for their strength and so make the movement
10   V,  7 |    moves the air gains more strength in each animal, so that
11   V,  7 |    calves and cows. Now the strength of all animals is in their
12   V,  7 |  females because the sinewy strength in the principle of the