Some progress, moreover, has been made through legislation. Laws compelling seats for women employees have helped wherever they have been enforced. Sanitary legislation, too, has effected certain improvements, though it is doubtful whether, on the whole, such legislation has as yet more than balanced the ill results of the greater concentration of population and the greater strain of work. In a number of states legislation has also brought an answer to the prayer of the “unknown factory girl” of 1846, God grant, that, in the mills, a day May be but “Ten Hours” long.[27] But at the same time the speed and intensity of work have been greatly increased. Until about 1836, for example, a girl weaver tended, as a rule, only two looms, and if she wished to be absent for half a day, it was customary for her to ask two of her friends to tend an extra loom apiece so she should not lose her wages. By 1876 one girl tended six and sometimes eight looms. Meanwhile, too, the speed had been increased. In 1873 it was estimated that a girl spinner tended from two to three times as many spindles as she did in 1849.[28] This tendency to multiply the amount of work to be performed in a given time has continued active. Piece wages have meanwhile fallen so that the total earnings of the operatives have not been increased, but, taking into consideration the cost of living, have rather been decreased. In the sewing trades, too, the intensity of work has been very greatly increased by the use of the sewing machine, particularly when power-driven, by the resulting minute subdivision of labor, and by the sweating system. A certain amount of division of labor was practised, it is true, long before the invention of the sewing machine. Vest making, for example, was a separate and distinct business. But it was not until after the introduction of the machine that much progress was made in dividing the work upon a single garment. The sub-contract or sweating system, too, appears to have originated at least as early as 1844,[29] but probably did not assume an important place until introduced about 1863 by contractors for army clothing. At first, moreover, the work for the sub-contractors was nearly all done in the homes. The need, however, for capital to invest in machines and later in power to run the machines, naturally tended to gather the workers into sweat shops, into small establishments, and then into factories where every possible incentive was offered to the most intense concentration of energies and to excessive speed. As in the textile factories, too, piece-rate wages have fallen automatically with productivity so that, whatever the exertion required and the number of garments turned out, remuneration has remained near the subsistence level.