Even before the invention of John Kay's Fly Shuttle, which doubled the quantity of work a weaver could do in a day, we found that spinners had great difficulties in supplying sufficient yarn to the weavers. This seems to have applied both to the Lancashire cotton and to the Yorkshire woollen manufactures. After the fly-shuttle had come into common use this pressure of demand upon the spinners was obviously increased, and the most skilful organisation of middleman-clothiers was unable to supply sufficient quantities of yarn. This economic consideration directed more and more attention to experiments in spinning machinery, and so we find that, long before the invention of the jenny and the water-frame, ingenious men like John Kay of Bury, Wyatt, Paul, and others had tried many patents for improved spinning. The great inventions of Hargreaves and Arkwright and Crompton enabled spinning to overtake and outstrip weaving and when, about 1790, steam began to be applied to considerable numbers of spinning mills, it was no longer spinning but weaving that was the limiting process in the manufacture of woollen and cotton cloths.
This strain upon weaving, which had been tightening through the period of the great spinning improvements, acted as a special incentive to Cartwright, Horrocks, and others to perfect the power-loom in its application, first to woollen, then to cotton industries. Not until well into the nineteenth century, when steam power had been fully applied by many minor improvements, were the arts of spinning and weaving brought fully into line. The complete factory, where the several processes of carding, spinning, weaving (and even dyeing and finishing), are conducted under the same roof and worked in correspondence with one another, marks the full transition from the earlier form of domestic industry, where the family performed with simple tools their several processes under the domestic roof.[73]
§ 6. The history of these textile inventions does a good deal to dispel the "heroic" theory of invention—that of an idea flashing suddenly from the brain of a single genius and effecting a rapid revolution in a trade. No one of the inventions which were greatest in their effect, the jenny, the water-frame, the mule, the power-loom, was in the main attributable to the effort or ability of a single man; each represented in its successful shape the addition of many successive increments of discovery; in most cases the successful invention was the slightly superior survivor of many similar attempts. "The present spinning machinery which we now use is supposed to be a compound of about eight hundred inventions. The present carding machinery is a compound of about sixty patents."[74] This is the history of most inventions. The pressure of industrial circumstances direct the intelligence of many minds towards the comprehension of some single central point of difficulty, the common knowledge of the age induces many to reach similar solutions: that solution which is slightly better adapted to the facts or "grasps the skirts of happy chance" comes out victorious, and the inventor, purveyor, or, in some cases, the robber is crowned as a great inventive genius. It is the neglect of these considerations which gives a false interpretation to the annals of industrial invention by giving an irregular and catastrophic appearance to the working of a force which is in its inner pressure much more regular than in its outward expression. The earlier increments of a great industrial invention make no figure in the annals of history because they do not pay, and the final increment which reaches the paying-point gets all the credit, though the inherent importance and the inventive genius of the earlier attempts may have been as great or greater.
There is nothing fortuitous or mysterious in inventive energy. Necessity is its mother, which simply means that it moves along the line of least resistance. Men like Kay, Hargreaves, Arkwright, Cartwright, set their intelligence and industry to meet the several difficulties as they arose. Nearly all the great textile inventors were practical men, most of them operatives immersed in the details of their craft, brought face to face continually with some definite difficulty to be overcome, some particular economy desirable to make. Brooding upon these concrete facts, trying first one thing then another, learning from the attempts and failures made by other practical men, and improving upon these attempts, they have at length hit upon some contrivance that will get over the definite difficulty and secure the particular economy. If we take any definite invention and closely investigate it, we shall find in nearly every case it has thus grown by small increments towards feasibility. Scientific men, strictly so-called, have had very little to do with these great discoveries. Among the great textile inventors, Cartwright alone was a man leading a life of thought.[75] When the spinning machinery was crippled in its efficiency by the crude methods of carding, Lees and Arkwright set themselves to apply improvements suggested by common-sense and experience; when Cartwright's power-loom had been successfully applied to wool, Horrocks and his friends thought out precisely those improvements which would render it remunerative in the cotton trade.
Thus in a given trade where there are several important processes, an improvement in one process which places it in front of the others stimulates invention in the latter, and each in its turn draws such inventive intelligence as is required to bring it into line with the most highly-developed process. Since the later inventions, with new knowledge and new power behind them, often overshoot the earlier ones, we have a certain law of oscillation in the several processes which maintains progress by means of the stimulus constantly applied by the most advanced process which "makes the pace." There is nothing mysterious in this. If one process remains behind in development each increment of inventive effort successfully applied there brings a higher remuneration than if applied to any of the more forward processes. So the movement is amenable to the ordinary law of "Supply and Demand" enforced by the usual economic motives. As the invention of the fly-shuttle gave weaving the advantage, more and more attention was concentrated upon the spinning processes and the jenny was evolved; the deficiency of the jenny in spinning warp evolved the water-frame, which for the first time liberated the cotton industry from dependence upon linen warp: the demand for finer and more uniform yarns stimulated the invention of the mule. These notable improvements in spinning machinery, with their minor appendages, placed spinning ahead of weaving, and stimulated the series of inventions embodied in the power-loom. The power-loom was found to be of comparatively little service until the earlier processes of dressing and sizing had been placed on a level of machine development by the efforts of Horrocks and others. Not until after 1841 was an equilibrium reached in the development of the leading processes. So likewise each notable advance in the machinery for the main processes has had the effect of bringing an increase of inventive energy to bear upon the minor and the subsidiary processes—bleaching, dyeing, printing, etc. Even now the early process of "ginning" has not been brought fully into line in spite of the prodigious efforts, made especially in the United States, to overcome the difficulties involved in this preparatory stage of the cotton industry.
The following schedule will serve to show the relation of the growth of the cotton industry as measured by consumption of raw cotton to the leading improvements of machinery.
From this schedule it is evident that the history of this trade may be divided with tolerable accuracy into four periods.
(1) The preparatory period of experimental inventions of Wyatt, Paul, etc., to the year 1770.
(2) 1770 to 1792 (circa), the age of the great mechanical inventions.