A full inductive treatment would perhaps require this inquiry to be prefaced by a full history of the inventions which in the several industries mark the rise of the factory system and the adoption of capitalist methods. This, however, is beyond the scope of the present work, nor does it strictly belong to our scientific purpose, which is not to write the narrative of the industrial revolution, but to bring such analysis to bear upon the records of industrial changes as shall enable us to clearly discern the laws of those changes. The central position occupied by machinery as the chief material factor in the modern evolution of industry requires that a distinct answer should be given to the question, What is machinery? In distinguishing a machine from a mere tool or handicraft implement it is desirable to pay special attention to two points, complexity of structure and the activity of man in relation to the machine. Modern machinery in its most developed shape consists, as Karl Marx points out, of three parts, which, though mechanically connected, are essentially distinct, the motor mechanism, the transmitting mechanism, and the tool or working machine. "The motor mechanism is that which puts the whole in motion. It either generates its own motive power, like the steam-engine, the caloric engine, the electro-magnetic machine, etc., or it receives its impulse from some already existing natural force, like the water-wheel from a head of water, the windmill from wind, etc. The transmitting mechanism, composed of fly-wheels, shafting, toothed wheels, pullies, straps, ropes, bands, pinions, and gearing of the most varied kind, regulates the motion, changes its form where necessary, as, for instance, from linear to circular, and divides and distributes it among the working machines. These two first parts of the whole mechanism are there solely for putting the working machines in motion, by means of which motion the subject of labour is seized upon and modified as desired."[58]