National and other central labor bodies: 
  Amalgamated Meat Cutters’ and Butchers’ Workmen of North America
  American Federation of Musicians
  Boot and Shoe Workers’ Union
  British Women’s Trade Union League
  Cigar Makers’ International Union
  Daughters of St. Crispin
  International Brotherhood of Bookbinders
  International Glove Workers’ Union
  International Ladies’ Garment Workers
  International Typographical Union
  Massachusetts Working Women’s League
  National Industrial Congress
  National Labor Congress
  National Labor Union
  national trade unions, more than thirty from 1863 to 1873
  National Trades Union
  New England Congress, policies of
  railroad brotherhoods
  railway unions
  Retail Clerks International Union
  Shirt, Waist and Laundry Workers’ International Union
  Trades and Labor Congress of Canada
  United Felt, Panama and Straw Hat Trimmers
  United Garment Workers
  United Mine Workers
  United Textile Workers
  Women’s Department, Knights of Labor
  Women’s Labor Reform Associations
  Women’s National Labor League
  Women’s state labor unions
  Women’s Trade Union League
  Women’s Union Label League
  Working Women’s Labor Union for the State of N.Y. 
National Civic Federation
National Consumers’ League
National Young Women’s Christian Association
Neill, Charles P.
Nestor, Agnes
New York State Factory Investigating Committee
New York Sun
Northwestern University

Oberlin College
O’Brien, John
Occupations, and locality
  blind-alley trades
  boot and shoe workers
  button workers
  children’s employments
  department-store clerks
  dish-washing
  domestic work
  dressmakers
  employes in state institutions
  garment-workers. See sewing trades
  glass-blowers
  hat-workers
  house-cleaning developments
  laundry workers and laundresses
  mine-workers
  musicians
  nurses
  semi-skilled
  tobacco-and cigar-workers
  unskilled
  waitresses
O’Connor, Julia
O’Day, Hannah
O’Reilly, Leonora
O’Reilly, Mary
Organization, and minimum wage
  craft form of
  eventually international
  in unskilled trades
  industrial form of
  of colored races
  of department-store clerks
  of Italians
  of Orientals
  of Slavic Jewesses
  of women, by men
  of women backward
O’Sullivan, Mary E. See Mary E. Kenney
Outlook, quoted
Overwork and fatigue

Pankhurst, Mrs.
Patterson, Mrs. Emma
Pearson, Mrs. Frank J.
Perkins, L.S.
Philadelphia Ledger
Phillips, Wendell
Pillsbury, Parker
Poe, Clarence
Polish National Alliance
Popular disapproval of women’s trade unions
Potter, Frances Squire
Powderly, Mrs. Terence V.
Powderly, Terence V.
Power loom, first
Preferential shop
Proportional representation
Protection for young trade-union girls
Protocol of peace
Public employes
Public ownership, the latest development of industry
Putnam, Mrs. Mary Kellogg