The evils which this wretched commercial system has brought both upon Great Britain and her Colonies, cannot be cured by a remedy applied solely to one injured interest. No such selfish cry has ever been raised on the part of the agriculturists; on the contrary, we have all along maintained that it is only by a deliberate revision of the whole system, with due consideration to the circumstances, of each particular interest, that the proper measure of justice to British industry can be ascertained. Lord Derby does not propose in any way to favour the agriculturist at the expense of the artisan. His object and his desire is to place British labour on its proper footing, and to secure it against being crushed by the weight of foreign competition. We are of those who firmly believe in the reciprocity of interests in this great country. We cannot understand how one large interest can be unduly prostrated for the benefit of another. We are convinced that partial legislation ever has been, and ever must be, disastrous; and we agree entirely in the sentiment expressed by an eminent orator, in a speech delivered in the House of Commons--"Let them but once diminish the consumption of British-grown corn, and from that moment the consumption of iron, of hardware, of cotton, and of woollens must decline. There would come a fresh displacement of labour, and a fresh lowering of wages; and discontent, disturbance, and misery, would prove its inevitable consequences." Now, although it may be rather out of place, in this part of our paper, to state any facts relating to the present condition of the country, we are tempted to give one instance, which fully corroborates the views of the said orator, and proves the justness of his remark. The wages of the iron miners and colliers in the west of Scotland, a numerous and important class, seeing that upwards of fifteen thousand persons are directly engaged in that branch of industry in the two counties of Lanark and Ayr, were in 1845, and previous years, from 5s. to 6s. per day--on the average _five and sixpence_. But now that the duty has been taken off foreign corn, and British agriculture has been depressed, their wages have fallen to 2s. 6d. or 3s. per day--on the average, _two and ninepence_. Now let us see what the miners have gained in exchange. The average price of wheat for the years 1842, 1843, 1844, and 1845, was 48s. 5½d. per quarter. If we assume the present price to be 38s., there is a diminution of about _one-fifth_. To that extent, therefore, we may presume that the miners have profited by the reduction of the price of bread; but we apprehend it would be difficult to persuade them that the benefit is at all commensurate to the loss. They may save a fifth upon one article of consumption, but their wages are reduced to _one-half_.