Part, §

 1 Int    |        from a leak through the piston. Our author ascribes it
 2 Pre,  2|        tremendous power on the piston, caused its chain to break
 3 Pre,  2|     its chain to break and the piston to crush the bottom of the
 4 Exp    |        a vacuum, whereupon the piston is instantaneously pressed
 5 Exp    |        the cylinder. ~ ~L. The piston formed of a disk attached
 6 Exp    |    follow the movements of the piston, which movements can not
 7 Exp    |      to the depth to which the piston is pressed down into the
 8 Exp    |  pressing upon the area of the piston and thus forcing it down,
 9 Exp    |      against the bottom of the piston just as much as the atmosphere
10 Exp    |      atmosphere presses on the piston from above.~ ~R. A bar with
11 Exp    |        the atmosphere upon the piston, which is then hastily pressed
12 Exp    |  leaking past the edges of the piston, is drawn off.~ ~V. A pipe
13 Exp    | drawing off the water from the piston when it rises above the
14 Exp    |        tap which furnishes the piston with water from the reservoir
15   I,  2|       equal to the area of the piston and a height of 29 inches,
16   I,  2|        base as the area of the piston of the Dannemora fire-machine,
17   I,  3|         when the air below the piston is in its natural state,
18   I,  3|     whole atmosphere above the piston; but in case this air below
19   I,  3|        case this air below the piston should get weakened, then
20   I,  3|         then the air above the piston will press in proportion
21   I,  3|      the inner air; and as the piston is attached by a chain to
22   I,  6|     atmosphere is pressing the piston down at every stroke of
23   I,  6|        because the area of the piston contains 1018 2/7 square
24   I, 10|        air, existing under the piston, through the snifting valve
25   I, 11|       between the cylinder and piston, so that the cold water,
26   I, 11|         which is turned on the piston from above, stands, as it
27   I, 11|      against the bottom of the piston and falls back as a heavy
28   I, 11|    atmosphere to bear upon the piston of the machine with a force