Upon the characteristics of this fleece depends the commercial value of the fibre. The essential qualities of good and mature cotton are thus enumerated by an expert: 'Length of fibre; smallness or fineness in diameter; evenness and smoothness; elasticity; tensile strength and colour; hollowness or tube-like construction; natural twist; corrugated edges; and moisture.' The fibre of Indian cotton is only about five-eighths of an inch long; that of Sea Island about two inches. Then Sea Island cotton is a sort of creamy-white colour; and some kinds of American and Egyptian cotton are not white at all, but golden in hue; while other kinds, again, are snow-white. Although the term 'American Cotton' is applied to all the cotton produced in the United States of America, it really applies to a number of different varieties--such as Texas, Mobile, Upland, Orleans, &c.--each one known by its distinctive name. The differences are too technical for explanation here; but, generally speaking, the members of the 'hirsutum' species of the 'Gossypium' tribe now rule the world of cotton. They are the product of what is called the 'Cotton-belt' of the United States, an area stretching for about two thousand miles between its extreme points in the Southern States, which are North and South Carolina, Georgia, Alabama, Mississippi, Florida, Louisiana, Arkansas, and Texas. Over this area, soil and climate vary considerably. The 'Cotton-belt' lies, roughly speaking, between the thirtieth and fortieth parallels of north latitude. As an American expert says: 'Cotton can be produced with various degrees of profit throughout the region bounded on the north by a line passing through Philadelphia; on the south by a line passing a little south of New Orleans; and on the west by a line passing through San Antonio. This is the limit of the possibilities.' The cotton plant likes a light sandy soil, or a black alluvial soil like that of the Mississippi margins. It requires both heat and moisture in due proportions, and is sensitive to cold, to drought, and to excessive moisture. The American cotton-fields are still worked by negroes, but no longer slaves, as before the war; and, in fact, the negroes are now not only free, but some of them are considerable cotton-growers on their own account. On the other hand, one finds nowadays little of the old system of spacious plantations under one ownership. Instead, the cultivation is carried on on small farms and allotments, not owned but rented by the cultivators. Large numbers of these cotton farmers are 'financed' by dealers, by landowners, or even by local storekeepers.