These definitions exclude from our circle of view all Efforts of anybody put forth for other than commercial reasons; and they include all Efforts of everybody, from the President to the scrub, put forth under the inducement of a return-service or Wages. No good end seems to be reached by trying to distinguish, as Francis Walker does in his "Wages-Question," between the "Wages-class" and the "Salary-class," because there appears to be no scientific or other economical difference between Wages and Salary. Each is a return-service for another service rendered, and that is all there is to it. The whole class of Laborers, accordingly, in any civilized and progressive country, is immensely large and becoming constantly larger. Excluding, of course, from this class all persons in so far as they render so-called moral services to others, which are in their very nature _free_, such as those that spring from duty and courtesy and benevolence, and these happily are also an immense and fast-augmenting class, though our Science has nothing to do with them directly, the number of those persons in every community and in every rank of every community, who sell personal services of some sort in distinction from commodities and credits, is pretty nearly as large as the _per capita_ population of adults and competents within that circuit. It must be borne in mind, that the same persons whose primary business it may be to sell commodities or credits, often sell services also in some subordinate or incidental way; and also, that the same persons, who are dispensing on the one hand their gifts and moral renderings freely, are frequently of the busiest in selling on the other hand their personal services for pay. In other words, the sellers of Services cannot be discriminated _as to their persons_ from other sellers, or even from downright _givers_; but the _action_ itself, and the law of it, is quite distinct in the three cases of selling, and utterly diverse in the one case of giving.