['139', '(#193)', '############################################', 'WOOLLEN', 'YARN', 'SPINNING', '2.', 'That', 'drafting-twist', 'is', 'dependent', 'upon', 'the', 'speed', 'with', 'which', 'the', 'carriage', 'is', 'drawn', 'out', '(spindles', 'usually', 'running', 'at', 'a', 'constant', 'speed);', 'and', 'this', 'is', 'dependent', 'upon', 'a', 'change-wheel', 'which,', 'without', 'varying', 'the', 'speed', 'of', 'the', 'spindles,', 'varies', 'the', 'speed', 'of', 'the', 'carriage', 'and', 'thus', 'affects', 'the', 'turns', 'per', 'inch', 'during', 'the', 'outward', 'run', 'of', 'the', 'carriage.', 'There', 'is', 'usually', 'a', 'secondary', 'change', 'wheel', 'which-', 'coming', 'after', 'the', 'slubbing', 'peg', 'wheel-may', 'be', 'used', 'alone', 'or', 'in', 'conjunction', 'with', 'the', 'primary', 'change', 'wheel.', 'Thus', 'there', 'are', 'three', 'means', 'of', 'control', 'of', 'drafting-twist,', 'viz.', 'primary', 'change', 'wheel,', 'secondary', 'change', 'wheel', 'primary', 'and', 'secondary', 'change', 'wheels.', '3.', 'The', 'time', 'that', 'the', 'double', 'speed', 'is', 'in', 'action', 'decides', 'the', 'final', 'twist', 'given', 'to', 'the', 'yarn.', 'This', 'again', 'is', 'dependent', 'upon', 'the', 'twist-peg', 'already', 'referred', 'to.', 'In', 'many', 'cases', 'twist', 'may', 'be', 'calculated', 'in', 'mule', 'spinning', 'by', 'spindle', 'speed', 'and', 'time;', 'but', 'upon', 'the', 'whole', 'this', 'system', 'is', 'to', 'be', 'condemned-greater', 'accuracy', 'in', 'mule', 'spinning', 'is', 'much', 'needed.', '4.', 'Calculation', 'for', 'Production', ':', 'This', 'is', 'dependent', 'upon', 'three', 'factors', '(a)', 'Draws', 'of', 'carriage', 'per', 'minute', ';', '(6)', 'Length', 'of', 'draw;', 'and', '(c)', 'Count', 'of', 'yarn', 'to', 'be', 'spun.', 'Let', 'a', '=', 'draws', 'of', 'carriage', 'per', 'minute', ';', '6', 'length', 'in', 'yards', 'of', 'draw;', '=', 'counts', 'of', 'yarn', 'spun', '(yards', 'per', 'dram);', 'then', 'ахбо', 'хъ', '=', 'lb.', 'per', 'hour', 'calculated', '(theoretical)', 'pro-', '6', 'X', '256', 'duction', 'per', 'spindle.', 'Example', ':', 'с', 'Let', 'a', '=', '3', 'b', '70"', 'C', '=', '20', 'skeins,', 'then', '139']
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