David Ricardo 
On the Principles of Political Economy, and Taxation [PDF ebook] 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. But in’ different stages of society, the pro portions of the whole produce of the earth Which vvill be allotted to each ofi these classes, under the names of’ rent, profit, and wages, will be essentially different; depending main ly on the actual ‘fertility of the’ soil, on the accumulation of capital and population, and on the skill, ingenuity, and instruments em ployed in agriculture.