Adding machine mfg.; airplane repair and mfg.; automobile assembly, automobile laundry; bag manufacture; bank equipment mfg.; blacksmith; boiler mfg.; and repair of boilers not exceeding fifteen (15) H.P.; boot and shoe mfg.; broom mfg.; canning and preserving factory; carbon battery mfg.; carpet cleaning; celluloid mfg.; central station light and power; chair mfg.; chick hatchery; coal yard; coffin mfg.; concrete mixing and article mfg.; concrete pipe mfg.; cooperage company; cotton ginning and compressing; cotton seed products mfg.; disinfectant mfg.; dye manufacture; electric power plant; enameling and painting; paving products plant; building block mfg.; fixture mfg.; flour milling; grain storage and elevator; furniture mfg.; fur warehouse; hosiery mill; horseshoeing; insecticide mfg.; iron foundry; knit goods mfg.; leather goods mfg.; livery stable; machine shop; mattress factory; metal products, stamping and mfg.; milk processing plant; paper box mfg.; poultry feed mfg.; poultry slaughtering; planing mill; printing ink mfg.; public stable; railroad yards; roundhouse, shop; rice mill; rock crushing; rug cleaning, dust-proof rooms and equipment required; rug mfg.; shoe factory; sand, gravel, stone storage yards; storage battery mfg.; storage of live poultry, poultry dressing; textile mfg.; veterinary hospital; gasoline and oil storage and bulk stations, wholesale; welding shop; wood products mfg.; woodwork shop; abattoirs, slaughterhouses and meat packing plants processing meat for human consumption, including incidental and necessary operations;