£450 19th-22ndV, „ III. 25tb-33rd IV. 34th-42nd .. 34th-36th £300 37th-42nd . V. 40th-48th .
By providing the necessaries of life of machinery in order to replace tools, to produce the means of production is, in one instance, increased sixfold in eighteen years ” (I. C., p. 78.