[ Treatment of common metals; treatment of precious metals; development of photographic and cinematographic films; photocomposing, photographic printing, photogravure; processing of foodstuffs for use in manufacture; slaughtering of animals; leather working and fur conditioning; saddlery working; textile treating in the nature of mothproofing; wool treating; custom tailoring, embroidery; woodworking and timber processing; framing of works of art; treatment of liquids, chemicals, gas and air f...