He claims that the one is as practicable as the other. First, with regard to regulating the value of product according to work time or normal work. In order to do this the "normal work labour-day"--which in any trade equals one day (in the various trades it may consist of a varying number of normal time hours), and which represents a quantity of product equal to a normal day's work--this normal work day must be looked upon as the unit of work time or normal work, and in all trades it must be divided into an equal number (10) of work hours. The product in all trades will then be measured according to such work time. A quantity of product which should equal a full normal day's work, whether it be the product of half a normal time labour-day, or of two normal time labour-days, would represent or be worth one work day (10 work hours); a quantity of product which should equal half a normal day's work, whether it be the product of a normal work time or not, would represent or be worth half a day's work or five work hours. The product of a work hour in any trade would therefore, according to this measure, equal the product of a work hour in all other trades; or generally expressed: Products of equal work times are equal in value. Such is approximately the scheme of _Rodbertus_. A really normal labour-day--normal _time_ and normal _work_ labour-day--would be necessary in any regulated social system that sought on the one hand, in the matter of distribution of wages, to balance equally "the rights and interests of the workers amongst themselves"; and on the other hand, in the matter of productivity, to balance equally the "rights and interests of the workers with those of the whole community," by means of State intervention. It would therefore be necessary not merely in a State regulated capitalist society, with private property in the means of production, as _Rodbertus_ proposed to carry it out under a strongly monarchical system, but also and specially would it be necessary under a democratic Socialism, if, true to its principles as opposed to Communism, it aimed at rewarding each man proportionately to his performance, instead of allowing each man to work no more than he likes, and enjoy as much as he can, which is the communistic method.