the science, and ascertained their true limits, possesses at the same time sufficient common sense and independence of judgment to apply them. Mr Laing seems to us to be gifted in an eminent degree with these requisites for making good practical use of his theoretical knowledge of political economy. He appears to be fully aware of the vast amount of dangerous error that has resulted from a blind and indiscriminate application of the same abstract laws to all cases, without fully ascertaining their true character, or making allowance for those disturbing causes which often render the law wholly irrelevant. Political economy, like other sciences, has its two parts--the theory and the application; and it too often happens that a man who is well read in the first is totally incapable of giving an opinion on the second, and infinitely the more difficult branch. The platform orator or newspaper writer thinks that if he can but refer to an abstract formula borrowed from Ricardo or M'Culloch, it is sufficient to settle any question of social interests that may come before him--not considering that these formula and maxims _are_ abstract: and that their applicability to the affairs of everyday life may be affected by so many causes that it is scarcely possible to find any actual example to which they can be applied rigorously, and to their full extent. And hence the nonsense that is talked and written, under the name of political economy; hence the absurdities that are enacted under the idea, that nations can be governed by the square and plummet of its rules. "The truth has been missed," says Mr Jones, in the preface to his work on the Distribution of Wealth, "not because a steady and comprehensive study of the story and condition of mankind would not yield truth, but because those who have been most prominent in circulating error have really turned aside from the task of going through such an examination at all; have confined the observations on which they have founded their reasonings to the small portion of the earth's surface by which they were immediately surrounded; and have then proceeded at once to erect a superstructure of doctrines and opinions, either wholly false, or, if partially true, as limited in their application as the field from which the materials for them were collected."