In the next place, the density of population is, of course, an important factor for the growth of credit exchanges. A larger volume of business is settled by bank paper in a commercial center than in an agricultural community, even though the proportion of total business thus settled may not be larger. However, it is necessary that there should be a certain number of people within reach of a common center in order to have a bank established there. Of course the smaller the bank the fewer the people thus required. Thus again our inclination in the past to favor the establishment of the small independent banks has facilitated the spread of banking and promoted the volume of business settled in the country districts by credit payment and stimulated the banking habit among our people. Finally, the general education and intelligence of the mass of the people is an important factor. Men do not use banks unless they have confidence in them, and they have come to be regarded as a settled part of the ordinary commercial mechanism of the community. Our people are people of a wide general education and high order of intelligence. They understand the place and work of the bank in a community much better than the same number of people, for example, in a European country. This fact is strikingly brought out by a study of the proportion of retail business settled by means of checks, in what are called the "foreign" districts of our large cities, on the one hand, and in an agricultural community on the other. The European immigrant is not a man who has had banking connections in his home country, and he does not use them here, even though the facilities are more numerous. Such evidence as there is seems to indicate that payment by check has shown an increase during the past few years: (a) In the first place, the returns of our reports show a larger percentage in retail trade.... (b) The prosperity of the farmers in the Central West has enabled many to have bank accounts who fifteen years ago could not carry balances. The writer's information from central Illinois is strongly in this direction. (c) The third evidence is found in the growth of the number of small banks, especially in the country districts.... (d) The appearance of a considerable proportion of checks in the deposits of mutual savings banks is also, to some degree, significant.... On the other hand, the increase of that part of the population which consists of the wage-earning class, by whom the use of checks is small, is undoubtedly greater than that of our other classes of population. However, the wealthy classes, though fewer in number, have more to spend and their use of checks raises the proportion of credit paper in payments.