Part

 1 I  |         tries to understand the forces at work in the world in
 2 I  |       unfolding of the peculiar forces of pure reason in their
 3 I  |         machines and of natural forces we must, of course, in this
 4 I  |     also met with in the moving forces of inorganic nature; indeed,
 5 I  |         in the inorganic moving forces, when their capacity for
 6 I  |       simplest inorganic moving forces than by the actions of our
 7 I  |      discussion of other motive forces I must answer an objection
 8 II |        pass to other mechanical forces, those of elastic bodies.
 9 II |        has been gained.~Elastic forces are produced in gases by
10 II |     passes under the piston, it forces it upward; when the piston
11 II |     passes above the piston and forces it down again. The piston
12 II |         for work of the natural forces is either diminished or
13 III|         another kind of natural forces which can produce work -
14 III|       we have overcome chemical forces by chemical forces, through
15 III|     chemical forces by chemical forces, through the instrumentality
16 III|       same object by mechanical forces, if we produce the electrical
17 III|     between the various natural forces. We have decomposed water
18 III|        are produced by chemical forces.~In all conductors through
19 III|         the operation. Chemical forces can perform work, but they
20 III|   either chemical or mechanical forces, or heat.~We may express
21 III|  character of all known natural forces that their capacity for
22 III|         have seen that chemical forces, when they come into play,
23 III|    circuit of inorganic natural forces, we can transform each of
24 III|     between the various natural forces which modern physics has
25 III|       work of the other natural forces may be expressed in terms
26 III|       various inorganic natural forces working force may indeed
27 III|       total quantity of all the forces capable of work in the whole
28 III|         property of all natural forces, and which, as regards generality,
29 III|       the then known mechanical forces could be demonstrated in
30 III| possible even if heat, chemical forces, electricity, and magnetism
31 IV |        the origin of the moving forces which are at our disposal,
32 IV |        depths of the earth. The forces of man and animals must
33 IV |        the origin of the moving forces which we take into our service,