Some coal-mines advantageously situated cannot be wrought on account of their barrenness. The produce does not pay the expense. They can afford neither profit nor rent.

There are some of which the produce is barely sufficient to pay the labour, and replace, together with it ordinary profits, the stock employed in working them. They afford some profit to the undertaker of the work, but no rent to the landlord. They can be wrought advantageously by nobody but the landlord, who, being himself undertaker of the work, gets the ordinary profit of the capital which he employs in it. Many coal-mines in Scotland are wrought in this manner, and can be wrought in no other. The landlord will allow nobody else to work them without paying some rent, and nobody can afford to pay any.

Other coal-mines in