['253', '(', '331', ')', 'PRINCIPLES', 'AND', 'PRACTICE', 'Up', 'to', 'the', 'present', 'mechanical', 'doffing', 'has', 'only', 'been', 'applied', 'to', 'the', 'Flyer and Cap frames', ',', 'and', 'as', 'the', 'former', 'presented', 'fewer', 'difficulties', 'it', 'has', 'been', 'tackled', 'first.', 'RAFO', 'avec', 'Fig.', '73a.', '--', 'Section', 'of', 'the', 'Arnold-Forster Mechanical Doffer', '(', 'Made', 'by', 'Messrs.', 'Hall', 'and', 'Stell', ')', 'Mr.', "Percy Clough's flyer doffer", 'was', 'certainly', 'one', 'of', 'the', 'first', ',', 'and', 'it', 'is', 'interesting', 'to', 'note', 'that', 'it', 'is', 'still', 'running.', 'It', 'probably', 'owes', 'its', 'success', 'to', 'the', 'fact', 'that', 'it', 'modifies', 'nothing', 'in', 'the', 'normal', 'flyer frame', ',', '253']
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