Machinery (n.) does not lighten toil: the more it is used, the more the burden of toil increases.
Machinery (n.) lets you produce twice the yarn in an hour, but not twice the exchange value: in the long run 100 pounds of yarn fetch what 50 used to.
Machinery (n.) supplants skilled workers by unskilled, men by women, adults by children, and throws workers on the street in masses.
Machinery (n.) displaces workers with a promise of new employment that is really made to someone else — fresh exploitable blood and muscle for the capitalists; the dead may bury their dead.
Machinery (n.) wears out by the hours of labour, not by its own lifespan: make the workers drudge eighteen hours instead of twelve and two years of a machine become three.