TO FIND DRAUGHT CHANGE GEAR.
34. Rule to find the draught change gear required. When you change from one number to another on a frame or mule, when the draught and roving both have to be changed, multiply the number of the yarn being spun by the hank roving desired, and that product by the number of teeth in the draught change gear; using that for a dividend. Then multiply the number of the yarn desired by the hank roving, using that for a divisor; that product divided will tell the draught change gear that is required.