['199', '(#265)', '############################################', 'WORSTED', 'DRAWING', 'MACHINES', 'For', 'a', 'draft', 'of', '7.59', 'for', 'one', 'revolution', 'of', 'back', 'shaft,', 'therefore', '-1519', '=', '6-7', 'sections', '(or', 'teeth)', 'change', 'wheel', 'for', 'no', 'draft,', ',', 'I', 'X', '7.59', 'teeth', 'per', 'section', 'and', '*', '50', 'change', 'wheel', '•1519', 'Now', '.1519', 'is', 'the', 'reciprocal', 'of', '6.7', 'I', '50)', '=', "'1519", '6.7', 'Therefore', 'if', 'this', 'be', 'taken', 'as', 'the', 'G.P.', 'the', 'calculation', 'stands-', 'Draft', 'G.P.', 'Change', 'wheel', 'and', 'change', 'wheel', 'x', 'G.P.', '=', 'Draft.', '7:59', 'and', '(50', 'x', '•1519', '=', '7.59)', '•1519', 'This', 'corresponds', 'with', 'the', 'example', 'given', 'on', 'p.', '194.', 'It', 'should', 'be', 'noted', 'here', 'that', 'it', 'is', 'usually', 'necessary', 'to', 'check', 'calculations', 'similar', 'to', 'this', 'by', 'direct', 'experi-', 'ment.', 'In', 'the', 'case', 'of', 'this', 'particular', 'box', 'owing', 'to', 'slight', 'differences', 'the', 'G.P.', 'is', '106.', 'As', 'illustrating', 'the', 'difference', 'that', 'this', 'makes', '50', 'X', '•106', '=', '5.3', 'Draft', 'There', 'are', 'three', 'specially', 'interesting', 'features', 'in', 'this', 'box', '1.', 'The', 'front', 'rollers', 'are', 'extraordinarily', 'small,', 'thus', 'favouring', 'the', 'control', 'and', 'satisfactory', 'treat-', 'ment', 'of', 'the', 'shortest', 'wools', ';', '2.', 'The', 'front', 'rollers', 'are', 'spirally', 'grooved', ';', '3.', 'The', 'fallers', 'have', 'a', 'half-fall', 'action', 'favouring', 'the', 'reduction', 'of', 'the', 'distance', 'between', 'the', 'wool', 'in', 'the', 'faller', 'and', 'the', 'wool', 'under', 'the', 'control', 'of', 'the', 'front', 'roller', 'to', 'a', 'minimum.', 'A', 'variation', 'of', 'the', 'ordinary', 'gill-box', 'is', 'to', 'be', 'found', '199']
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