5. _Piecework._ Industrial improvements tend, Marx maintains, to overwork, to undue intensification of labour, for machinery can go at almost any rate all day and all night, and labourers are compelled by various expedients to work up to it. Among these expedients none is more strongly condemned by Marx than piecework, as encouraging over-exertion and overtime. He says that though known so early as the 14th century, piecework only came into vogue with the large system of production, to which he thinks it the most suitable form of payment. He states (though this is not quite accurate) that it is the only form of payment in use in workshops that are under the factory acts, because in these workshops the day of labour cannot be lengthened, and the capitalist has no other way open to him of exploiting the labourer but by increasing the intensity of the labour. He ridicules the idea of a writer who thought "the system of piecework marked an epoch in the history of the working man, because it stood halfway between the position of a mere wage labourer depending on the will of the capitalist and the position of the co-operative artisan who in the not distant future promises to combine the artisan and the capitalist in his own person." Better far, he holds, for the labourer to stick to day's wages, for he can be much more easily and extensively exploited by the piece system. He contends that experience has proved this in trades like the compositors and ship carpenters, in which both systems of payment are in operation side by side, and he cites from the factory inspectors' reports of 1860 the case of a factory employing 400 hands, 200 paid by the piece and 200 by the day. The piece hands had an interest in working overtime, and the day hands were obliged to follow suit without receiving a farthing extra for the additional hour or half-hour. This might be stopped by further legislation, but then Marx holds that the system of piece payment is so prone to abuse that when one door of exploitation shuts another only opens, and legislation will always remain ineffectual. Every peculiarity of the system furnishes opportunity either for reducing wages or increasing work. On the piece system the worth of labour is determined by the worth of the work it does, and unless the work possess average excellence the stipulated price is withheld. There is thus always a specious pretext ready to the employer's hand for making deductions from wages on the ground that the work done did not come up to the stipulated standard. Then again, it furnishes the employer with a definite measure for the intensity of labour. He judges from the results of piecework how much time it generally takes to produce a particular piece, and labourers who do not possess the average productivity are turned off on the ground that they are unable to do a minimum day's work. Even those who are kept on get lower average wages than they would on the day system.