The American Cyclopædia (1879)
“ As one roller is filled it is taken away to the carding machine, and an empty one is set in its place. This process is conducted with such perfect regularity, that the weight of the cotton fed to the machine determines the fineness of the thread afterward produced. The carding process has already been referred to as perfected by Arkwright. It is one of the most ingenious of the operations of this manufacture. The improved machines consist of a large drum covered with cards of wire teeth revolving in a box, which is lined with cards of teeth that come nearly in contact with those upon the drum ”
