No equal quantity of productive labour employed in manufactures, can ever occasion so great reproduction. In them Nature does nothing; man does all
 Adam Smith, The Wealth of Nations (1776). copy citation

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Author Adam Smith
Source The Wealth of Nations
Topic reproduction labour
Date 1776
Language English
Reference An Inquiry into the Nature and Causes of the Wealth of Nations
Note
Weblink http://www.gutenberg.org/files/3300/3300-h/3300-h.htm

Context

“It is the work of Nature which remains, after deducting or compensating every thing which can be regarded as the work of man. It is seldom less than a fourth, and frequently more than a third, of the whole produce. No equal quantity of productive labour employed in manufactures, can ever occasion so great reproduction. In them Nature does nothing; man does all; and the reproduction must always be in proportion to the strength of the agents that occasion it. The capital employed in agriculture, therefore, not only puts into motion a greater quantity of productive labour than any equal capital employed in manufactures;” source