As value resides in human estimation, it will frequently vary as to the same object. An intending purchaser may have one notion of the value of an article, an intending seller another. Money, therefore, is a measure of value in the sense that it is a measure of the average human judgment--from which results price. As Mr. McCulloch says, no means known to science or art should be left untried to keep the value of money unchanging. When a man promises to deliver money or makes any time contract, he makes a mental calculation as to what amount of property, or of the product of his labor, will enable him to meet his engagement. If he be a farmer, raising wheat, there passes through his mind the sacrifice and toil necessary to raise it, and the quantity he can raise; if a cotton manufacturer the cost of spindles, of looms, and steam-engines; the wages of labor and interest on plant. I knew a cotton manufacturer who wanted $10,000. His business was good. He was sober, honest, and industrious; had a thorough knowledge of his trade; managed his employés himself, and took the greatest pains to conduct his business on the strictest business principles. He wanted the money to make some improvements in his factory. He knew how many spindles and looms he had; how much could be done with a pound of cotton, how much it cost, and how much each spindle and loom would do. He said to a capitalist, "I know all about cotton spinning and weaving, and do not know anything about this thing called money, but I want $10,000 of it." Said he, "My cloth is worth 10 cents a yard; it sells at that rate in unlimited quantities by wholesale; nobody can make it any cheaper; but I am not working a gold mine; I am not manufacturing legal-tender paper money, and the only way I can get money is to swap my cotton cloth for it. I will give you my note for 100,000 yards of cotton cloth, which will be equal to $10,000, and will pay 2 inches a yard each year as interest." This was satisfactory to the capitalist, and the note was made, signed, and delivered accordingly, and the improvements were made in the factory. During the year everything went smoothly; the spindles and looms worked well, repairs to machinery were light; cotton had been bought at proper rates; and no improved processes had been discovered or applied in the production of cotton-cloth. There was no hitch in any direction.