Harsco Corp celebrated its sesquicentennial some 10 years ago, making this lesser known, $1.5 billion market cap industrial company about 160 years old. Its three operating groups lead in their respective categories: Metals & Minerals service steel mills and represents about two-thirds of its revenues; Rail Services about 15%, and Industrial Services include a broad range of industrial plants and energy exploration / processing for the remaining diversification of about 19%.