TWO-ROVING.
10. In running two-roving together, always have them of the same hank, because if one is of one hank, and the other of another, there will be more twist in one than in the other, and will not make as good yarn, and will not draw as even as they would if they were of the same twist or hank. To know what the two hanks would be single; you must add the two hanks together, and divide that by four to get it single.