UNTIL NOW, WE HAVE CONSIDERED THE PART OF THE WORK DAY WHERE THE WORKER ONLY COMPENSATES FOR THE VALUE THAT THE CAPITALIST PAYS HIM, AS A CONSTANT VALUE, WHAT IT IS REALITY UNDER INVARIABLE PRODUCTION CONDITIONS. BEYOND THIS NECESSARY TIME, THE WORK COULD BE EXTENDED BY TWO, THREE, FOUR, FOUR, FIVE, SIX, ETC., HOURS. BASED ON THE SIZE OF THIS EXTENSION, THE RATE OF APPRECIATION AND THE LENGTH OF THE DAY VARIED. IF THE WORKING TIME REQUIRED WAS CONSTANT, THE WHOLE DAY WAS VARIABLE.