Any process of assembly, manufacture or treatment constituting an unusual nuisance by reason of odor, smoke or noise when placed in proximity to residential or business areas, including but not limited to the manufacture or refining of asphalt; the manufacture or processing of cork, fertilizer, linoleum or oilcloth, soap and glue or gelatin; the tanning of hides and skins; the rendering of tallow or other fats; slaughterhouses, except for poultry; the manufacture of paint, oil and varnish; boiler works or drop forges; and the production of power in excess of 25 rated horsepower by the use of bituminous coal except with the use of smoke- and fly-ash-elimination appliances.