Tracts on subjects of national importance. [electronic resource] : I. On the advantages of manufactures, Commerce, and Great Towns, to the Population and Prosperity of a Country. II. Difficulties stated to a proposed assessment of the land tax: And another Subject of Taxation proposed, not liable to the same Objections. By the Rev. John M'farlan, D. D. F. R. S. Scotland. And Author of the Inquiries concerning the Poor.