text:  Our design being to demonstrate by the force of example and contrast the sophistical absurdity of absolute theories that however naturally and harmoniously their parts may be made to correspond in thesis and system as a whole according to which the same consequences upon a given principle should inevitably flow from certain causes yet that practically it is found the same causes do not produce the same effects even when circumstances are most analogous; that for instance the protective or restrictive system of industry under the rule of which Spain languishes notwithstanding the abundant possession of the first materials for the promotion of manufacturing and the prosperity of agricultural interests proves at the other extremity of Europe the spring of successful progress and industrial accumulation and renders Russia prosperous though proportionally not more largely gifted with those natural elements of wealth and production which consist in fertility of soil in mines of the precious metals of coal iron &c