You see then, your assertion, that the workman produces, in the last hour but one, the value of his wages, and in the last hour your net profit, amounts to no more than this, that in the yarn produced by him in working hours, whether they are the first or the last hours of the working day, in that yarn, there are incorporated working hours, or just a whole day's work,.e., two hours of his own work and hours of other people's.