Part

 1 I  |       work is performed for ten pounds fall through five feet.
 2 I  |     measurement of work by foot pounds is universally applicable.
 3 I  | labourer works, a weight of 100 pounds, the block is then in equilibrium,
 4 I  |       motion. The weight of 100 pounds sinks, that of 400 rises.~
 5 I  |        risen. But a fall of 100 pounds through four feet is just
 6 I  |    foot-pounds as a fall of 400 pounds through one foot.~The action
 7 I  |        b", and a weight of four pounds at "a", the lever is then
 8 I  |        the heavy weight of four pounds has been raised, while the
 9 I  |   through four inches; and four pounds through one inch is, as
10 III|         He has measured in foot pounds the amount of work which
11 III|         necessary to raise 80.9 pounds of water from the freezing