It is upon this account that, in the chapter in which I treat of productive and unproductive labour, I have classed artificers, manufacturers, and merchants among the productive labourers, and menial servants among the barren or unproductive.

正是由于这个原因，在我讨论生产劳动和非生产劳动的那一章中，我将工匠、制造商和商人归类为生产劳动者，将仆人归类为贫瘠或非生产劳动者。