Turning now from the subject of financial administration of the mills to that of profits; it is not clear that gratifying earnings were usually due to good management; it is, however, true that poor profits or no profits were due oftener than otherwise to faulty executive control. It is meant by this to indicate that the industry in the South has shown itself, on the side of profitableness, singularly responsive to the material condition of the section, and to the state and trend of public opinion. The degree of success of the mills has displayed the fundamental fact that the South has in the past forty years been above all else in a process of growth, and has given fresh proof of the intimate connection between the fortunes of the companies and the changes in the whole section--economic, mental and spiritual. The profits of the mills have constituted a good barometer to the evolution of the South since Reconstruction. Graphically represented, the earnings of the plants would exhibit a curve of decided aspect. It is sought by specific references to make this curve appear, and afterwards to sum up the results with several reasons therefore. Tompkins, by many believed to have been the best authority on cotton manufacturing in the South, wrote: "It has been abundantly proved by experience in the Carolinas that cotton mills on every class of goods manufactured there, can make a profit of 10 to 30 per cent. This has been done by the smallest as well as the largest mills on the coarsest and the finest yarns, single as well as twisted; and on the heaviest as well as the lightest weight cloths; and on dyed and undyed yarns and cloths. The variation in profit between 10 and 30 per cent. is caused by variation in prices of cotton and of manufactured goods, and also by variation in management." In another passage he has said: "From the experience of the best mills that have been running in the South for twenty years and over, and which have always been kept well up to date, it would appear that about 15 per cent. is the average annual profit in clear money for the whole time."[359] The writer was given the opinion by Mr. Thackston of Greenville, South Carolina, in whose knowledge and judgment great reliance is put, that for the last ten years the average earnings for well-managed Southern mills have been $2.50 per spindle, which, reckoning the average cost of the plants at $20 to the spindle (leaving aside other capital invested) is a profit of 12.25 per cent.[360]