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 reverse of fortune. The same may be said of a knowledge of classical literature, mathematics, history, natural philosophy, chemistry, geology, mineralogy, botany, &c. &c. On the same principle, those who had learnt to dance, to sing, or to fence for their amusement might more or less imperfectly teach dancing, singing, or fencing, for money. In short, if we include under the denomination of wealth all the qualities of the mind and body which are susceptible of being hired, we shall find that by the restriction of the term wealth, to that which has exchangeable value, we have advanced but little towards removing the confusion and uncertainty attendant upon the former definition; and all idea of estimating the increase of wealth in any country, or making any moderate approaches towards it, must be absolutely hopeless.

On the other hand, if we confine the definition of wealth to those objects which either have been exchanged, or are specifically intended to be exchanged, we shall attempt to draw a broad line of demarcation between things which in regard to their qualities are precisely similar; and further exclude from the category of wealth a great mass of articles, which have been included, and most correctly so, by Adam Smith, and by almost every person who makes use of the term, either in writing or conversation. The various information acquired by private study, and destined for private use and enjoyment, may be exactly of the same kind as that which is intended to be let out if any body will hire it; yet the first, in this classification, is not to be called wealth, and the other is. The person who buys instruction, buys an amount of wealth, which it must be presumed is equal in value to what he has paid for it, while the self-taught person, who is in possession of much superior knowledge, has acquired no wealth. According to this definition wealth cannot be given; it can only be bought. The instructions of the schoolmaster are wealth; the same instructions given by a friend