160 (#216) ############################################ WOOLLEN AND WORSTED SPINNING mohair twist-may certainly be produced by twisting, and for a limited variety of fancy patterns, from time to . time, will be in demand; but saving for a short period recurring about every seven years* such effects are rarely called for. Usually twisting would spoil the two or three types of fancy woollen yarns to be presently described, but it is, of course, conceivable that in very special cases fancy single woollen yarns might be combined in two - fold or three - fold effects for very special novelties. Winding.There is much to be urged against changing the form of yarn when once spun. On the other hand, there is often a limit to the size of bobbin or spool upon which a yarn may be directly spun, and if the yarn from three spinning mule spools can be wound on to one shuttle spool the stoppages for shuttling of the loom by which the yarn is to be woven will be reduced from three to one. There is, however, a limit to the size of the shuttle. The “for” and “ against ” will again prove a useful method of consideration. For Winding. Against Winding. Three spools on to one shuttle Extra cost. spool; the time saved in Mixing of doffings possible. weaving Yarn looked over; knotted Mixing of wound and un- and slubbed. wound or double-wound spools possible. For warping it is desirable to Softer tension. obtain the necessary Bobbin breadths less marked length per cheese and on the lists. thus ensure regular ten- sioning throughout the warping operation. * The periodicity of colour recurrence is said to be about 7 years, but no facts supporting this length of period are available. 160
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