The labour of Watt in contriving the steam-engine was as essential a part of production as that of the mechanics who buildor the engineers who work the instrument; and was undergone, no less than theirs, in the prospect of a remuneration from the produce.

• 瓦特发明蒸汽机的劳动，同机械工建造蒸汽机或车工开动蒸汽机的劳动一样，都是生产必不可少的组成部分，而且前者同后者一样，都指望从产品那里获得报酬。