COARSE THREADS.
15. How coarse threads are made. First, by coarse roving; second by spinners letting two roving run through the guide; third, by one end catching on to another and running on to the bobbin; fourth, sometimes where there is two ends on one boss, one end will break and catch onto the other and spin. If the trouble is in the spinning, you untwist the thread and you will find two threads instead of one. If not two threads, the trouble is in the carding room.