Karl Marx,
Das Kapital
(1906)
“ Here we find, amongst others, the following edifying passage: "Under the present law, no mill in which persons under 18 years of age are employed, ... can be worked more than 111/2 hours a day, that is 12 hours for 5 days in the week, and nine on Saturday. "Now the following analysis (!) will show that in a mill so worked, the whole net profit is derived from the last hour. I will suppose a manufacturer to invest £100,000:—£80,000 in his mill and machinery, and £20,000 in raw material and wages. ”
