quantity of those necessary articles which the state of the demand for labour, whether increasing, stationary, or declining, requires that he should have. A tax upon those articles necessarily raises their price somewhat higher than the amount of the tax, because the dealer, who advances the tax, must generally get it back with a profit. Such a tax must, therefore, occasion a rise in the wages of labour proportionable to this rise of price.

It is thus that a tax upon the necessaries of life operates exactly in the same manner as a direct tax upon the wages of labour.

The labourer, though he may pay it out of his hand, cannot, for any considerable time at least, be properly said even to advance it. It must always in the long-run be advanced to him by his immediate employer in the advanced