In the southern states of America, the cotton cultivated is distinguished into three kinds; the nankeen cotton, so called from its color; the green See d cotton, producing white cotton with green See ds. These grow in the middle and upper country, and are called short staple cotton. The black See d cotton, cultivated in the lower country near the sea, and on the isles near the shore, produces cotton of a fine, white, silky appearance, very strong and of a long staple. The See ds of the long staple cotton are separated by roller-gins. The See ds of the short staple cotton are separated with more difficulty, by a sawgin invented by E. Whitney.