Book, Paragraph

 1  IV,  3 |    thing drier at the end the agent has been dry heat. Hence
 2  IV,  3 |      and moist medium and the agent is the heat of the body.
 3  IV,  5 |    causes besides matter, the agent and the quality brought
 4  IV,  5 |    quality brought about, the agent being the efficient cause,
 5  IV,  5 |     As we have explained, the agent operates by means of two
 6  IV,  5 |    that dries things, but the agent in both cases is heat, either
 7  IV,  5 |   heating or cooling, but the agent is always heat, either internal
 8  IV,  6 |      earth and water, and the agent is either dry heat or cold.
 9  IV,  6 |        therefore, must be the agent in solidifying it.~Hence
10  IV,  9 | consisting of water), and the agent in softening them is fire.
11  IV,  9 |      copper can be melted the agent in its case is not water,
12  IV,  10|   formed in the same way: the agent is not fire, but cold which
13  IV,  10|     other class of bodies the agent is external fire.) In those
14  IV,  10|      and whether fire was the agent in its formation, or cold,