(1) _Induction._ This is the logical and universal process, by which the mind naturally passes up from a certain number of observed cases, in which a certain quality appears, to a Generalization, which is a conception of the mind followed by a statement in words to the effect, that _all possible cases_ of that kind will exhibit the quality already observed in _the few cases_. It has as its basis a confidence in the resemblances and uniformities of Nature; it proceeds upon the axiom that Nature throughout is consistent with herself; and this confidence has been ten thousand times justified in the issue, when it is found that Nature preordained the Sciences by causing grand analogies to run through each department of her works, including man and his works. The structure of the human mind corresponds with these objective resemblances; it seizes upon them, and delights in them, and naturally and joyfully infers and concludes that what has been observed of _a part_ may be safely affirmed of _the whole_ of that kind; accordingly, the world over, when certain things are found to be true in a considerable number of cases, the mind leaps over space and time to a whole class, and frames for itself a general rule or principle, which binds all the cases into one bundle, and thereafter confidently affirms what is known to be true of some to be probably true of all. This is inductive Generalization; and the strength and the joy of it is well expressed by Descartes: "_I have thought that I could take as a just generalization that which I very clearly and vividly conceived to be true._" Experience in Economics corresponds to Experiment in the Physical Sciences, and furnishes to Induction all the fuel it can ask for to feed its logical furnace and to forge the chains that bind the Cases to the Classes. Personal experience in buying and selling, local experience in buying and selling, and national experience in buying and selling, with all that belongs to these, the records of which are full to overflowing, afford to the inductive inquirer in Economics an inexhaustible supply of material. Instances abound. Particulars may be gathered up one by one on every hand and linked into the inductive chain. If any doubt be felt about the strength of any one of these chains, another one may at once be linked in terms drawn from another field of Experience with a view to test the strength of the first. Most fortunate from this point of view is the United States, because here there are States with substantive powers of control over most matters of trade within their borders, as well as a Nation with sovereign powers of control over some points of trade within the country as a whole. This feature has given birth to commercial experiments as well as commercial experience of all kinds; and Induction rejoices in all these abundant materials for generalization thus furnished free of cost to Science, though unfortunately not free of cost to the People.