274 (#360) ############################################ WOOLLEN AND WORSTED SPINNING Tentative Rule.--In any drawing boxes in sequence, the succeeding heads or spindles will balance the preceding heads or spindles if varied- As doublings in succeeding boxes : drafts in succeeding boxes. Example : Required the number of spindles in 4th box to follow one spindle in 3rd box, the 4th drawing box having doublings 4, draft 6. As 4 : 6::1:* = i} spindles in succeeding box required to keep up with preceding box (sliver speeds being the same in each case). Two points at once come into prominence here. In the first place, I} spindles is an awkward number to place in a box-the spindles or heads would probably be increased to two, or one head or spindle employed with the sliver speed increased 50 per cent. These points will be considered a little later, The second point is that usually it will be desirable to take a suitable number of spindles in one of the boxes, and to work out the heads or spindlage backwards and forwards in accordance with the above principle, and also in accordance with the further influencing factors still to be dealt with. As a rule, the first drawing-box-usually a four-spindle box-will be made the basis of the calculation. It should be noted that the rule given above will apply to any box in the set, the doublings and drafts of the boxes in between being the deciding factors. Thus with the following- Box 1 2 3 4 Doublings 4 4 3 Draft 4 5 6 6 the number of heads or spindles in box 4 to follow one head or spindle in box 1 will be : As (4 X 3 X 2) : (5 x 6 x 6) ::1:x = 7'5 spindles in box 4. 2 274
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