No horse, mule, cow, calf, swine, sheep, goat or domestic fowl shall be kept in any dwelling or part thereof.  Nor shall any animal be kept on the same lot or premises within a dwelling except under such conditions as may be prescribed by the Health Officer.  No such animal shall under any circumstances be kept on the same lot or premises with a multiple dwelling.  No dwelling or the lot or premises thereof shall be used for the business of storage or handling of rags or junk.