['214', '(', '286', ')', 'WOOLLEN', 'AND', 'WORSTED', 'SPINNING', 'larities', 'introduced', 'there', 'will', 'not', 'only', 'make', 'control', 'of', 'the', 'delivery', 'difficult', ',', 'but', 'will', 'result', 'in', 'defective', 'slivers', 'and', 'ultimately', 'in', 'an', 'irregular', 'thread.', 'A', 'review', 'of', 'present-day', 'practice', 'with', 'reference', 'to', 'delivery', 'into', 'spinning machines', 'almost', 'completely', 'demonstrates', 'the', 'principles', 'involved.', 'Thus', 'the', 'follow-', 'ing', 'varieties', 'are', 'to', 'be', 'noted', ':', '-', '(', 'a', ')', 'The', 'woollen mule—surface', 'delivery', 'without', 'any', 'tension', ';', '(', 'b', ')', 'The', 'French drawing frame', 'from', 'lightly', 'held', '(', 'upright', ')', 'balls', 'on', 'staves', ';', '(', 'c', ')', 'The', 'cone drawing-box', 'from', 'more', 'heavily', 'held', '(', 'horizontal', ')', 'or', 'lightly', 'held', '(', 'upright', ')', 'bobbins', ';', '(', 'd', ')', 'The', 'open drawing-box-pull', 'from', 'heavily', 'held', '(', 'horizontal', ')', 'bobbins', 'In', 'the', 'case', 'of', '(', 'a', ')', 'there', 'must', 'be', 'no', 'strain', 'on', 'the', 'sliver', 'at', 'all.', 'In', 'the', 'case', 'of', '(', '6', ')', 'the', 'arrangement', 'shown', 'results', 'in', 'a', 'draw', 'into', 'the', 'back rollers', 'with', 'practically', 'no', 'straining', 'of', 'the', 'sliver.', 'In', 'the', 'case', 'of', '(', 'c', ')', 'as', 'little', 'twist', 'as', 'possible', 'is', 'often', 'inserted', 'during', 'the', 'delivery', 'of', 'the', 'slivers', 'so', 'that', 'as', 'a', 'rule', 'the', 'twist', 'is', 'calculated', 'to', 'ensure', 'a', 'feed', 'without', 'straining', 'of', 'the', 'sliver', ',', 'and', 'for', 'this', 'pur-', 'pose', 'the', 'upright', 'position', 'of', 'the', 'bobbin', 'is', 'better', 'than', 'the', 'horizontal', 'position', 'of', 'the', 'bobbin', ',', 'although', 'the', 'horizontal', 'position', 'is', 'more', 'frequently', 'adopted.', 'In', 'the', 'case', 'of', '(', 'd', ')', 'the', 'twist', 'is', 'inserted', 'to', 'ensure', 'fibre-control', 'during', 'drafting', ',', 'and', 'is', 'usually', 'such', 'that', 'the', 'horizontal', 'position', 'of', 'the', 'bobbin', 'may', 'be', 'adopted', 'without', 'fear', 'of', 'any', 'straining', 'of', 'the', 'slivers.', 'Investigations', 'into', 'the', 'strain', 'on', 'a', 'given', 'sliver', 'under', 'the', 'different', 'forms', 'of', 'sliver', 'delivery', 'here', 'referred', 'to', ',', 'might', 'well', 'be', 'taken', 'in', 'hand.', 'Whatever', 'form', 'may', 'be', 'decided', 'upon', 'in', 'taking', '214']
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