The primary purpose of the M-1 Industrial District is to permit certain industries, which do not in any way detract from residential desirability, to locate in any area adjacent to residential uses. The provisions relating to height of building, horsepower, heating, controlling emissions of fumes, odors and/or noise, landscaping, the number of persons employed and hours of operation are imposed to protect and foster adjacent residential desirability while permitting industries to locate near a labor supply.